public class Test060511 extends Application {

    private int score = 0;

    @Override
    public void start(Stage primaryStage) {
        Group root = new Group();
        Scene scene = new Scene(root, 800, 600);
        Text t = new Text();

        randomNew(root, 10);

        root.setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {

                Circle c = (Circle) event.getTarget();
                root.getChildren().remove(c);
                root.getChildren().remove(t);

                score++;
                t.setCache(true);
                t.setX(10.0);
                t.setY(30.0);
                t.setFill(Color.RED);
                t.setText("Score: " + score);
                t.setFont(Font.font(null, FontWeight.BOLD, 16));

                root.getChildren().add(t);
                randomNew(root, 1);
            }
        });

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void randomNew(Group root, int quantity) {
        for (int i = 0; i < quantity; i ++) {
            Circle circle=new Circle(15, Color.GOLD);
            circle.setCenterX(Math.random() * 800);
            circle.setCenterY(Math.random() * 600);
            root.getChildren().add(circle);
        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}