public void display(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        GLU glu = new GLU();
        
        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        
        GameScene.render(gl, glu, drawable);
        // Flush all drawing operations to the graphics card
        gl.glFlush();
    }