Graphic(int width, int height, int ux, int uy) {
    frameWidth = width;
    frameHeight = height;

    unityX = ux;
    unityY = uy;

    this.setOpaque(true);
    this.setPreferredSize(new Dimension(frameWidth, frameHeight));
    this.setBorder(BorderFactory.createBevelBorder(1));

    instance = this;

    function = new FunctionGraphic(new MyTestFunction());
  }