.gitignore

+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# Idea
+.idea/
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+

.gitlab-ci.yml

+image: openjdk:17-alpine
+
+variables:
+  GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+
+before_script:
+  - export GRADLE_USER_HOME=`pwd`/.gradle
+
+cache:
+  paths:
+    - .gradle/wrapper
+    - .gradle/caches
+
+stages:
+  - build
+  - test
+
+build:
+  stage: build
+  script: ./gradlew --build-cache assemble
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: push
+    paths:
+      - build
+      - .gradle
+
+java:
+  stage: test
+  script: ./gradlew test
+  artifacts:
+    when: always
+    reports:
+      junit: build/test-results/test/**/TEST-*.xml
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: pull
+    paths:
+      - build
+      - .gradle
\ No newline at end of file

build.gradle

+
+plugins {
+    id("com.github.johnrengelman.shadow") version "8.1.1"
+    id 'application'
+    id 'java'
+    id "org.openjfx.javafxplugin" version "0.1.0"
+}
+
+javafx {
+    version = "21"
+    modules = [ 'javafx.controls', 'javafx.fxml', 'javafx.graphics']
+}
+
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
+    testImplementation("org.assertj:assertj-core:3.24.2")
+    testImplementation("org.junit.jupiter:junit-jupiter:5.10.0")
+}
+
+test {
+    useJUnitPlatform()
+}
+
+application {
+    mainClass.set("app.SimulatorMain")
+}
+
+

gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

+rootProject.name = 'firefighter'
+include 'src:main:aapp'
+findProject(':src:main:aapp')?.name = 'aapp'
+

src/main/java/App.java

-import javafx.application.Application;
-import javafx.scene.Group;
-import javafx.scene.Scene;
-import javafx.scene.control.Button;
-import javafx.scene.layout.HBox;
-import javafx.scene.layout.VBox;
-import javafx.stage.Stage;
-
-import static java.lang.Thread.sleep;
-
-
-public class App extends Application {
-
-    public static void main(String[] args) {
-        launch(args);
-    }
-
-    @Override
-    public void start(Stage primaryStage) throws InterruptedException {
-        Group root = new Group();
-        Button restart = new Button("Restart");
-        VBox buttons = new VBox();
-        HBox total = new HBox();
-        Grid grid = new Grid(1000,1000,20,20);
-
-        root.getChildren().add(total);
-        total.getChildren().add(buttons);
-        total.getChildren().add(grid);
-        buttons.getChildren().add(restart);
-        restart.setOnMouseClicked(grid::restart);
-        primaryStage.setScene(new Scene(root));
-        primaryStage.show();
-        grid.repaint();
-        new Thread(new Runnable() {
-            @Override
-            public void run() {
-                while(true){
-                    try {
-                        sleep(50);
-                        grid.model.activation();
-                        grid.repaint();
-                    } catch (InterruptedException e) {
-                        e.printStackTrace();
-                    }
-                }
-
-            }
-        }).start();
-    }
-}
-

src/main/java/Grid.java

-import javafx.scene.canvas.Canvas;
-import javafx.scene.canvas.GraphicsContext;
-import javafx.scene.input.MouseEvent;
-import javafx.scene.paint.Color;
-
-public class Grid extends Canvas{
-    int width, height, colCount, rowCount;
-    Model model;
-
-
-    public Grid(int width, int height, int colCount, int rowCount) {
-        super(width,height);
-        this.width = width;
-        this.height = height;
-        this.colCount = colCount;
-        this.rowCount = rowCount;
-        setFocusTraversable(true);
-        setOnMousePressed(this::mousePressed);
-        model = new Model(this);
-        model.initialisation(3,8);
-    }
-
-    public void restart(MouseEvent mouseEvent){
-        model = new Model(this);
-        model.initialisation(3,6);
-        getGraphicsContext2D().clearRect(0,0,width,height);
-        repaint();
-    }
-    private void mousePressed(MouseEvent mouseEvent) {
-        model.activation();
-        repaint();
-            /*double x = mouseEvent.getX();
-            double y = mouseEvent.getY();
-            model.click((int)x*rowCount/height,(int)y*colCount/width);*/
-    }
-
-    void repaint(){
-        for(int col=0; col<colCount; col++)
-            getGraphicsContext2D().strokeLine(0, col*width/colCount,height, col*width/colCount);
-        for(int row=0; row<rowCount;row++)
-            getGraphicsContext2D().strokeLine(row*height/rowCount,0,row*height/rowCount,width);
-
-    }
-
-    void paint(int row, int col){
-        getGraphicsContext2D().setFill(Color.WHITE);
-        getGraphicsContext2D().fillRect(row*height/rowCount,col*width/colCount,height/rowCount,width/colCount);
-    }
-
-    public void paintFF(int row, int col) {
-        getGraphicsContext2D().setFill(Color.BLUE);
-        getGraphicsContext2D().fillRect(row*height/rowCount,col*width/colCount,height/rowCount,width/colCount);
-    }
-
-    public void paintFire(int row, int col) {
-        getGraphicsContext2D().setFill(Color.RED);
-        getGraphicsContext2D().fillRect(row*height/rowCount,col*width/colCount,height/rowCount,width/colCount);
-    }
-
-}
\ No newline at end of file

src/main/java/Model.java

-import java.util.*;
-
-
-public class Model {
-    Grid grid;
-    int colCount, rowCount;
-    List<Position> firefighters = new ArrayList<>();
-    Set<Position> fires = new HashSet<>();
-    List<Position> ffNewPositions;
-    int step = 0;
-
-    public Model(Grid grid) {
-        this.grid = grid;
-        colCount = grid.colCount;
-        rowCount = grid.rowCount;
-    }
-
-
-    public void initialisation(int fireNumber, int fireFighterNumber){
-        for(int index=0; index<fireNumber;index++)
-            fires.add(randomPosition());
-        for(int index=0; index<fireFighterNumber;index++)
-            firefighters.add(randomPosition());
-    }
-
-    private Position randomPosition() {
-        return new Position((int) (Math.random()*rowCount), (int) (Math.random()*colCount));
-    }
-
-
-    public void activation(){
-        ffNewPositions = new ArrayList<>();
-        for(Position ff : firefighters){
-            Position newPosition = activateFirefighter(ff);
-            grid.paint(ff.row,ff.col);
-            grid.paintFF(newPosition.row, newPosition.col);
-            ffNewPositions.add(newPosition);
-        }
-        firefighters = ffNewPositions;
-        if(step%2==0){
-            List<Position> newFires = new ArrayList<>();
-            for(Position fire : fires){
-                newFires.addAll(activateFire(fire));
-            }
-            for(Position newFire : newFires)
-                grid.paintFire(newFire.row, newFire.col);
-
-            fires.addAll(newFires);}
-        step++;
-
-    }
-
-    private List<Position> activateFire(Position position) {
-        return next(position);
-    }
-
-
-
-    private Position activateFirefighter(Position position) {
-        Position randomPosition = aStepTowardFire(position);
-                //next(position).get((int) (Math.random()*next(position).size()));
-        List<Position> nextFires = next(randomPosition).stream().filter(fires::contains).toList();
-        extinguish(randomPosition);
-            for (Position fire : nextFires)
-                extinguish(fire);
-            return randomPosition;
-        }
-
-        private void extinguish(Position position) {
-        fires.remove(position);
-        grid.paint(position.row, position.col);
-    }
-
-    private List<Position> next(Position position){
-        List<Position> list = new ArrayList<>();
-        if(position.row>0) list.add(new Position(position.row-1, position.col));
-        if(position.col>0) list.add(new Position(position.row, position.col-1));
-        if(position.row<rowCount-1) list.add(new Position(position.row+1, position.col));
-        if(position.col<colCount-1) list.add(new Position(position.row, position.col+1));
-        return list;
-    }
-
-    private Position aStepTowardFire(Position position){
-        Queue<Position> toVisit = new LinkedList<>();
-        Set<Position> seen = new HashSet<>();
-        HashMap<Position,Position> firstMove = new HashMap<>();
-        toVisit.addAll(next(position));
-        for(Position initialMove : toVisit)
-            firstMove.put(initialMove,initialMove);
-        while(!toVisit.isEmpty()){
-            Position current = toVisit.poll();
-            if(fires.contains(current))
-                return firstMove.get(current);
-            for(Position adjacent : next(current)){
-                if(seen.contains(adjacent)) continue;
-                toVisit.add(adjacent);
-                seen.add(adjacent);
-                firstMove.put(adjacent, firstMove.get(current));
-            }
-        }
-        return position;
-    }
-
-    public record Position(int row, int col){}
-}
\ No newline at end of file

src/main/java/app/SimulatorApplication.java

+package app;
+
+import controller.Controller;
+import javafx.application.Platform;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+import java.net.URL;
+
+public class SimulatorApplication extends javafx.application.Application {
+  private static final String VIEW_RESOURCE_PATH = "/view/view.fxml";
+  private static final String APP_NAME = "Firefighter simulator";
+  private static final int ROW_COUNT = 20;
+  private static final int COLUMN_COUNT = 20;
+  private static final int BOX_WIDTH = 50;
+  private static final int BOX_HEIGHT = 50;
+  public static final int INITIAL_FIRE_COUNT = 3;
+  public static final int INITIAL_FIREFIGHTER_COUNT = 6;
+
+  private Stage primaryStage;
+  private Parent view;
+  private void initializePrimaryStage(Stage primaryStage) {
+    this.primaryStage = primaryStage;
+    this.primaryStage.setTitle(APP_NAME);
+    this.primaryStage.setOnCloseRequest(event -> Platform.exit());
+    this.primaryStage.setResizable(true);
+    this.primaryStage.sizeToScene();
+  }
+
+  @Override
+  public void start(Stage primaryStage) throws IOException {
+    initializePrimaryStage(primaryStage);
+    initializeView();
+    showScene();
+  }
+
+  private void initializeView() throws IOException {
+    FXMLLoader loader = new FXMLLoader();
+    URL location = SimulatorApplication.class.getResource(VIEW_RESOURCE_PATH);
+    loader.setLocation(location);
+    view = loader.load();
+    Controller controller = loader.getController();
+    controller.initialize(BOX_WIDTH, BOX_HEIGHT, COLUMN_COUNT, ROW_COUNT,
+            INITIAL_FIRE_COUNT, INITIAL_FIREFIGHTER_COUNT);
+  }
+
+  private void showScene() {
+    Scene scene = new Scene(view);
+    primaryStage.setScene(scene);
+    primaryStage.show();
+  }
+
+  public static void main(String[] args) {
+    launch(args);
+  }
+}

src/main/java/app/SimulatorMain.java

+package app;
+
+public class SimulatorMain {
+  public static void main(String[] args){
+    SimulatorApplication.main(args);
+  }
+}

src/main/java/controller/Controller.java

+package controller;
+
+import javafx.animation.Animation;
+import javafx.animation.KeyFrame;
+import javafx.animation.Timeline;
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ToggleButton;
+import javafx.scene.control.ToggleGroup;
+import javafx.util.Duration;
+import javafx.util.Pair;
+import model.Board;
+import model.ModelElement;
+import model.FirefighterBoard;
+import util.Position;
+import view.Grid;
+import view.ViewElement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.util.Objects.requireNonNull;
+
+public class Controller {
+
+  public static final int PERIOD_IN_MILLISECONDS = 50;
+  @FXML
+  public Button restartButton;
+  @FXML
+  public Button oneStepButton;
+  @FXML
+  public Label generationNumberLabel;
+  @FXML
+  private ToggleButton pauseToggleButton;
+  @FXML
+  private ToggleButton playToggleButton;
+  @FXML
+  private Grid<ViewElement> grid;
+  private Timeline timeline;
+  private Board<List<ModelElement>> board;
+
+  @FXML
+  private void initialize() {
+    initializePlayAndPauseToggleButtons();
+    initializeTimeline();
+  }
+
+  private void initializePlayAndPauseToggleButtons() {
+    ToggleGroup toggleGroup = new PersistentToggleGroup();
+    toggleGroup.getToggles().addAll(playToggleButton, pauseToggleButton);
+    pauseToggleButton.setSelected(true);
+  }
+
+  private void setModel(FirefighterBoard firefighterBoard) {
+    this.board = requireNonNull(firefighterBoard, "firefighter.model is null");
+  }
+
+  private void updateBoard(){
+    List<Position> updatedPositions = board.updateToNextGeneration();
+    List<Pair<Position, ViewElement>> updatedSquares = new ArrayList<>();
+    for(Position updatedPosition : updatedPositions){
+      List<ModelElement> squareState = board.getState(updatedPosition);
+      ViewElement viewElement = getViewElement(squareState);
+      updatedSquares.add(new Pair<>(updatedPosition, viewElement));
+    }
+    grid.repaint(updatedSquares);
+    updateGenerationLabel(board.stepNumber());
+  }
+
+  private void repaintGrid(){
+    int columnCount = board.columnCount();
+    int rowCount = board.rowCount();
+    ViewElement[][] viewElements = new ViewElement[rowCount][columnCount];
+    for(int column = 0; column < columnCount; column++)
+      for(int row = 0; row < rowCount; row++)
+        viewElements[row][column] = getViewElement(board.getState(new Position(row, column)));
+    grid.repaint(viewElements);
+    updateGenerationLabel(board.stepNumber());
+  }
+
+  private ViewElement getViewElement(List<ModelElement> squareState) {
+    if(squareState.contains(ModelElement.FIREFIGHTER)){
+      return ViewElement.FIREFIGHTER;
+    }
+    if (squareState.contains(ModelElement.FIRE)){
+      return ViewElement.FIRE;
+    }
+    return ViewElement.EMPTY;
+  }
+
+  private void initializeTimeline() {
+    Duration duration = new Duration(Controller.PERIOD_IN_MILLISECONDS);
+    EventHandler<ActionEvent> eventHandler =
+            event -> updateBoard();
+    KeyFrame keyFrame = new KeyFrame(duration, eventHandler);
+    timeline = new Timeline(keyFrame);
+    timeline.setCycleCount(Animation.INDEFINITE);
+  }
+
+  public void play() {
+    timeline.play();
+  }
+
+  public void pause() {
+    timeline.pause();
+  }
+
+  public void pauseToggleButtonAction() {
+    this.pause();
+  }
+
+  public void playToggleButtonAction() {
+    this.play();
+  }
+
+  public void restartButtonAction() {
+    this.pause();
+    board.reset();
+    pauseToggleButton.setSelected(true);
+    repaintGrid();
+  }
+
+  public void initialize(int squareWidth, int squareHeight, int columnCount,
+                                int rowCount, int initialFireCount, int initialFirefighterCount) {
+    grid.setDimensions(columnCount, rowCount, squareWidth, squareHeight);
+    this.setModel(new FirefighterBoard(columnCount, rowCount, initialFireCount, initialFirefighterCount));
+    repaintGrid();
+  }
+
+  public void oneStepButtonAction() {
+    this.pause();
+    updateBoard();
+  }
+
+  private void updateGenerationLabel(int value){
+    generationNumberLabel.setText(Integer.toString(value));
+  }
+}
\ No newline at end of file

src/main/java/controller/PersistentToggleGroup.java

+package controller;
+
+import javafx.collections.ListChangeListener.Change;
+import javafx.scene.control.Toggle;
+import javafx.scene.control.ToggleButton;
+import javafx.scene.control.ToggleGroup;
+import javafx.scene.input.MouseEvent;
+
+/**
+ * An extension of {@link ToggleGroup} that ensures that a {@link Toggle} in a group must always be
+ * selected.
+ *
+ */
+class PersistentToggleGroup extends ToggleGroup {
+
+  /**
+   * Creates a new {@code PersistentToggleGroup}.
+   */
+  PersistentToggleGroup() {
+    getToggles().addListener((Change<? extends Toggle> change) -> {
+      while (change.next()) {
+        for (Toggle toggle : change.getAddedSubList()) {
+          ToggleButton toggleButton = (ToggleButton) toggle;
+          toggleButton.addEventFilter(MouseEvent.MOUSE_RELEASED, mouseEvent -> {
+            if (toggleButton.equals(getSelectedToggle())) {
+              mouseEvent.consume();
+            }
+          });
+        }
+      }
+    });
+  }
+
+}

src/main/java/model/Board.java

+package model;
+
+import util.Position;
+
+import java.util.List;
+
+/**
+ * This interface represents a generic board for modeling various state-based systems.
+ *
+ * @param <S> The type of state represented on the board.
+ */
+public interface Board<S> {
+
+  /**
+   * Get the state of the board at a specific position.
+   *
+   * @param position The position on the board for which to retrieve the state.
+   * @return The state at the specified position.
+   */
+  S getState(Position position);
+
+  /**
+   * Set the state of a specific position on the board to the specified state.
+   *
+   * @param state The state to set for the given position.
+   * @param position The position on the board for which to set the state.
+   */
+  void setState(S state, Position position);
+
+  /**
+   * Get the number of rows in the board.
+   *
+   * @return The number of rows in the board.
+   */
+  int rowCount();
+
+  /**
+   * Get the number of columns in the board.
+   *
+   * @return The number of columns in the board.
+   */
+  int columnCount();
+
+  /**
+   * Update the board to its next generation or state. This method may modify the
+   * internal state of the board and return a list of positions that have changed
+   * during the update.
+   *
+   * @return A list of positions that have changed during the update.
+   */
+  List<Position> updateToNextGeneration();
+
+  /**
+   * Reset the board to its initial state.
+   */
+  void reset();
+
+  /**
+   * Get the current step number or generation of the board.
+   *
+   * @return The current step number or generation.
+   */
+  int stepNumber();
+}
+

src/main/java/model/FirefighterBoard.java

+package model;
+
+import util.Position;
+
+import java.util.*;
+
+
+public class FirefighterBoard implements Board<List<ModelElement>> {
+  private final int columnCount;
+  private final int rowCount;
+  private final int initialFireCount;
+  private final int initialFirefighterCount;
+  private final TargetStrategy targetStrategy = new TargetStrategy();
+  private List<Position> firefighterPositions;
+  private Set<Position> firePositions;
+  private Map<Position, List<Position>> neighbors = new HashMap();
+  private final Position[][] positions;
+  private int step = 0;
+  private final Random randomGenerator = new Random();
+
+  public FirefighterBoard(int columnCount, int rowCount, int initialFireCount, int initialFirefighterCount) {
+    this.columnCount = columnCount;
+    this.rowCount = rowCount;
+    this.positions = new Position[rowCount][columnCount];
+    for (int column = 0; column < columnCount; column++)
+      for (int row = 0; row < rowCount; row++)
+        positions[row][column] = new Position(row, column);
+    for (int column = 0; column < columnCount; column++)
+      for (int row = 0; row < rowCount; row++) {
+        List<Position> list = new ArrayList<>();
+        if (row > 0) list.add(positions[row - 1][column]);
+        if (column > 0) list.add(positions[row][column - 1]);
+        if (row < rowCount - 1) list.add(positions[row + 1][column]);
+        if (column < columnCount - 1) list.add(positions[row][column + 1]);
+        neighbors.put(positions[row][column], list);
+      }
+    this.initialFireCount = initialFireCount;
+    this.initialFirefighterCount = initialFirefighterCount;
+    initializeElements();
+  }
+
+  public void initializeElements() {
+    firefighterPositions = new ArrayList<>();
+    firePositions = new HashSet<>();
+    for (int index = 0; index < initialFireCount; index++)
+      firePositions.add(randomPosition());
+    for (int index = 0; index < initialFirefighterCount; index++)
+      firefighterPositions.add(randomPosition());
+  }
+
+  private Position randomPosition() {
+    return new Position(randomGenerator.nextInt(rowCount), randomGenerator.nextInt(columnCount));
+  }
+
+  @Override
+  public List<ModelElement> getState(Position position) {
+    List<ModelElement> result = new ArrayList<>();
+    for (Position firefighterPosition : firefighterPositions)
+      if (firefighterPosition.equals(position))
+        result.add(ModelElement.FIREFIGHTER);
+    if (firePositions.contains(position))
+      result.add(ModelElement.FIRE);
+    return result;
+  }
+
+  @Override
+  public int rowCount() {
+    return rowCount;
+  }
+
+  @Override
+  public int columnCount() {
+    return columnCount;
+  }
+
+  public List<Position> updateToNextGeneration() {
+    List<Position> modifiedPositions = updateFirefighters();
+    modifiedPositions.addAll(updateFires());
+    step++;
+    return modifiedPositions;
+  }
+
+  private List<Position> updateFires() {
+    List<Position> modifiedPositions = new ArrayList<>();
+    if (step % 2 == 0) {
+      List<Position> newFirePositions = new ArrayList<>();
+      for (Position fire : firePositions) {
+        newFirePositions.addAll(neighbors.get(fire));
+      }
+      firePositions.addAll(newFirePositions);
+      modifiedPositions.addAll(newFirePositions);
+    }
+    return modifiedPositions;
+
+  }
+
+  @Override
+  public int stepNumber() {
+    return step;
+  }
+
+  private List<Position> updateFirefighters() {
+    List<Position> modifiedPosition = new ArrayList<>();
+    List<Position> firefighterNewPositions = new ArrayList<>();
+    for (Position firefighterPosition : firefighterPositions) {
+      Position newFirefighterPosition =
+              targetStrategy.neighborClosestToFire(firefighterPosition,
+                      firePositions, neighbors);
+      firefighterNewPositions.add(newFirefighterPosition);
+      extinguish(newFirefighterPosition);
+      modifiedPosition.add(firefighterPosition);
+      modifiedPosition.add(newFirefighterPosition);
+      List<Position> neighborFirePositions = neighbors.get(newFirefighterPosition).stream()
+              .filter(firePositions::contains).toList();
+      for (Position firePosition : neighborFirePositions)
+        extinguish(firePosition);
+      modifiedPosition.addAll(neighborFirePositions);
+    }
+    firefighterPositions = firefighterNewPositions;
+    return modifiedPosition;
+  }
+
+  @Override
+  public void reset() {
+    step = 0;
+    initializeElements();
+  }
+
+  private void extinguish(Position position) {
+    firePositions.remove(position);
+  }
+
+
+  @Override
+  public void setState(List<ModelElement> state, Position position) {
+    firePositions.remove(position);
+    for (; ; ) {
+      if (!firefighterPositions.remove(position)) break;
+    }
+    for (ModelElement element : state) {
+      switch (element) {
+        case FIRE -> firePositions.add(position);
+        case FIREFIGHTER -> firefighterPositions.add(position);
+      }
+    }
+  }
+}
\ No newline at end of file

src/main/java/model/ModelElement.java

+package model;
+
+public enum ModelElement {
+  FIREFIGHTER, FIRE
+}

src/main/java/module-info.java

+module firefighter {
+  requires javafx.controls;
+  requires javafx.fxml;
+  requires javafx.graphics;
+  opens controller to javafx.fxml;
+  exports app;
+  opens app to javafx.fxml;
+}

src/main/java/util/Position.java

+package util;
+
+public record Position(int row, int column) {
+
+}