Board Made of Rectangles

I don't know if this is the right way to do this but I seems looks like
a good idea.

app/build.gradle

@@ -9,6 +9,7 @@
 plugins {
     // Apply the application plugin to add support for building a CLI application in Java.
     id 'application'
+    id 'org.openjfx.javafxplugin' version '0.0.13'
 }
 
 repositories {
@@ -29,6 +30,11 @@ application {
     mainClass = 'jchess.App'
 }
 
+javafx {
+    version = "20"
+    modules = [ 'javafx.controls']
+}
+
 tasks.named('test') {
     // Use JUnit Platform for unit tests.
     useJUnitPlatform()

app/src/main/java/jchess/App.java

@@ -1,14 +1,44 @@
-/*
- * This Java source file was generated by the Gradle 'init' task.
- */
 package jchess;
 
-public class App {
-    public String getGreeting() {
-        return "Hello World!";
+
+import javafx.application.Application;
+import javafx.scene.Scene;
+import javafx.scene.input.KeyEvent;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.GridPane;
+import javafx.scene.paint.Color;
+import javafx.scene.shape.Rectangle;
+import javafx.stage.Stage;
+
+public class App extends Application {
+
+    public final static int WIDTH = 500, HEIGHT = 500;
+    public final static String PROGRAM_NAME = "JChess";
+    public static void main(String[] args) {
+        launch();
     }
 
-    public static void main(String[] args) {
-        System.out.println(new App().getGreeting());
+    @Override
+    public void start(Stage primaryStage) throws Exception {
+        BorderPane root = new BorderPane();
+
+        GridPane board = new GridPane();
+
+        Rectangle[][] cases = new Rectangle[8][8];
+        for (int i = 0; i < 8; i++) {
+            for (int j = 0; j < 8; j++) {
+                cases[i][j] = new Rectangle(WIDTH/8, HEIGHT/8);
+                cases[i][j].setFill((i + j) % 2 == 0 ? Color.WHITE : Color.LIGHTGRAY);
+                board.add(cases[i][j], i, j);
+            }
+        }
+
+
+        root.setCenter(board);
+        Scene scene = new Scene(root, WIDTH, HEIGHT);
+        scene.addEventHandler(KeyEvent.KEY_PRESSED, new KeyboardEvent());
+        primaryStage.setScene(scene);
+        primaryStage.setTitle(PROGRAM_NAME);
+        primaryStage.show();
     }
 }

app/src/main/java/jchess/KeyboardEvent.java

@@ -0,0 +1,16 @@
+package jchess;
+
+import javafx.application.Platform;
+import javafx.event.EventHandler;
+import javafx.scene.input.KeyCode;
+import javafx.scene.input.KeyEvent;
+
+public class KeyboardEvent implements EventHandler<KeyEvent> {
+    @Override
+    public void handle(KeyEvent event) {
+        System.out.println(event.getCharacter());
+        if(event.getCode() == KeyCode.Q){
+            Platform.exit();
+        }
+    }
+}