MovingBB8.java

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.stage.Stage;

public class MovingBB8 extends Application {

    @Override 
    public void start(Stage primaryStage) { 
        BB8Pane pane = new BB8Pane();
        pane.setOnKeyPressed(e -> { 
            if (e.getCode() == KeyCode.LEFT) {
                pane.moveLeft();
            } else if (e.getCode() == KeyCode.RIGHT) {
                pane.moveRight();
            }
        });

       
        Scene scene = new Scene(pane, 400, 120);
        primaryStage.setTitle("MovingBB8"); 
        primaryStage.setScene(scene); 
        primaryStage.show();

        pane.requestFocus();
    }

    // Main method to launch application
    public static void main(String[] args) {
        launch(args);
    }
} 

class BB8Pane extends Pane {
    private Circle circle1 = new Circle(200, 50, 15);
    private Circle circle2 = new Circle(200, 70, 20);
    private Line line = new Line(200, 25, 200, 35);

    public BB8Pane() {
        line.setStroke(Color.BLACK);
        circle1.setFill(Color.CORAL);
        circle2.setFill(Color.CORAL);

        getChildren().addAll(circle1, circle2, line);
    }

    public void moveLeft() {
        circle1.setCenterX(circle1.getCenterX() - 5);
        circle2.setCenterX(circle2.getCenterX() - 5);
        line.setStartX(line.getStartX() - 5);
        line.setEndX(line.getEndX() - 5);
    }

    public void moveRight() {
        circle1.setCenterX(circle1.getCenterX() + 5);
        circle2.setCenterX(circle2.getCenterX() + 5);
        line.setStartX(line.getStartX() + 5);
        line.setEndX(line.getEndX() + 5);
    }
}