// TODO: hide on mouse over

static BlinkScreenArea blinkScreenArea(Rectangle r) {

  ret new BlinkScreenArea(r).go();

}

sclass BlinkScreenArea {

  int count, max = 12;

  int delay = 150;

  BufferedImage img, img2;

  JWindow window;

  JLabel lbl;

  Rectangle area;

  *(Rectangle r) ctex {

    // clip to screen

    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize ();

    r = new Rectangle(screenSize).intersection(r);

    area = r;

    new Robot robot;

    img = robot.createScreenCapture(r);

    img2 = changeBrightness(img, 2f);

    img = changeBrightness(img, 0.5f);

  }

  BlinkScreenArea go() {

    awt {

      // make JWindow

      window = new JWindow;

      window.setBounds(area);

      lbl = new JLabel(new ImageIcon(img2));

      window.add(lbl);

      window.setAlwaysOnTop(true);

      window.setVisible(true);

      installTimer(lbl, delay, r { step(); });

    }

    ret this;

  }

  void step() {

    ++count;

    if (count > max)

      print("huh?");

    else if (count == max)

      window.dispose(); // should stop timer too

    else

      lbl.setIcon(new ImageIcon((count & 1) == 0 ? img : img2));

  }

}