import org.l
  }

/**
 * Render the current frame
 */
private static void render() {
  // clear the screen
  GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_STENCIL_BUFFER_BIT);

  // center square according to screen size
  GL11.glPushMatrix();
  GL11.glTranslatef(Display.getDisplayMode().getWidth() / 2, Display.getDisplayMode().getHeight() / 2, 0.0f);

    // rotate square according to angle
   // GL11.glRotatef(angle, 0, 0, 1.0f);

    // render the square
    GL11.glBegin(GL11.GL_QUADS);
      GL11.glVertex2i(-200, -200);
      GL11.glVertex2i(200, -200);
      GL11.glVertex2i(200, 200);
      GL11.glVertex2i(-200, 200);
    GL11.glEnd();

  GL11.glPopMatrix();
}
}