import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
import javax.swing.event.AncestorListener;
import javax.swing.event.AncestorEvent;
import javax.swing.Timer;
public class main {

public static void main(String[] args) throws Exception {
  blinkScreenArea(new Rectangle(0, 0, 300, 200));
}


// TODO: hide on mouse over

static BlinkScreenArea blinkScreenArea(Rectangle r) {
  return new BlinkScreenArea(r).go();
}

static class BlinkScreenArea {
  int count, max = 12;
  int delay = 150;
  BufferedImage img, img2;
  JWindow window;
  JLabel lbl;
  Rectangle area;

  BlinkScreenArea(Rectangle r) { try {
 
    // clip to screen
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize ();
    r = new Rectangle(screenSize).intersection(r);
    area = r;
  
    Robot robot = new Robot();
    img = robot.createScreenCapture(r);
    img2 = changeBrightness(img, 2f);
    img = changeBrightness(img, 0.5f);
  
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

  BlinkScreenArea go() {
    SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {

      // 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, new Runnable() { public void run() { try {  step(); } catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}});
    } catch (Exception _e) {
  throw _e instanceof RuntimeException ? (RuntimeException) _e : new RuntimeException(_e); } }
});
    return 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));
  }
}

static volatile StringBuffer local_log = new StringBuffer(); // not redirected
static volatile StringBuffer print_log = local_log; // might be redirected, e.g. to main bot

// in bytes - will cut to half that
static volatile int print_log_max = 1024*1024;
static volatile int local_log_max = 100*1024;

static void print() {
  print("");
}

// slightly overblown signature to return original object...
static <A> A print(A o) {
  String s = String.valueOf(o) + "\n";
  StringBuffer loc = local_log;
  StringBuffer buf = print_log;
  int loc_max = print_log_max;
  if (buf != loc && buf != null) {
    print_append(buf, s, print_log_max);
    loc_max = local_log_max;
  }
  if (loc != null) 
    print_append(loc, s, loc_max);
  System.out.print(s);
  return o;
}

static void print(long l) {
  print(String.valueOf(l));
}

static void print(char c) {
  print(String.valueOf(c));
}

static void print_append(StringBuffer buf, String s, int max) {
  synchronized(buf) {
    buf.append(s);
    max /= 2;
    if (buf.length() > max) try {
      int newLength = max/2;
      int ofs = buf.length()-newLength;
      String newString = buf.substring(ofs);
      buf.setLength(0);
      buf.append("[...] ").append(newString);
    } catch (Exception e) {
      buf.setLength(0);
    }
  }
}
static BufferedImage changeBrightness(BufferedImage src, float val) {
  return new RescaleOp(val, 0, null).filter(src, null);
}

// first delay = delay
static void installTimer(JComponent component, Runnable r, int delay) {
  installTimer(component, r, delay, delay);
}

// first delay = delay
static void installTimer(JFrame frame, int delay, Runnable r) {
  installTimer(frame.getRootPane(), r, delay, delay);
}

// first delay = delay
static void installTimer(JComponent component, int delay, Runnable r) {
  installTimer(component, r, delay, delay);
}

static void installTimer(final JComponent component, final Runnable r, final int delay, final int firstDelay) {
  installTimer(component, r, delay, firstDelay, true);
}

static void installTimer(final JComponent component, final Runnable r, final int delay, final int firstDelay, final boolean repeats) {
  SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {

    final Timer timer = new Timer(delay, new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent _evt) { 
      r.run();
    }});
    timer.setInitialDelay(firstDelay);
    timer.setRepeats(repeats);
    
    if (component.isShowing())
      timer.start();
  
    component.addAncestorListener(new AncestorListener() {
      public void ancestorAdded(AncestorEvent event) {
        timer.start();
      }
  
      public void ancestorRemoved(AncestorEvent event) {
        timer.stop();
      }
  
      public void ancestorMoved(AncestorEvent event) {
      }
    });
  } catch (Exception _e) {
  throw _e instanceof RuntimeException ? (RuntimeException) _e : new RuntimeException(_e); } }
});
}

}