public void start(){
        try {
            Display.setTitle("openGLTutorialPongGame learning!");
            Display.setResizable(true);
            Display.setDisplayMode(new DisplayMode(WIDTH, HEIGHT));
            Display.setVSyncEnabled(VSYNC);
            Display.setFullscreen(FULLSCREEN);

            Display.create();
        } catch (LWJGLException e) {
            e.printStackTrace();
        }

        create();

        resize();

        isRunning = true;

        while (isRunning && !Display.isCloseRequested()) {
            if (Display.wasResized()) {
                resize();

                render();

                Display.update();
                Display.sync(60);

            }

        }
        dispose();
        Display.destroy();

    }