Super simple little app I made to play a prank on a co-worker, took all of about 10 minutes to make...if that, it's only 18 lines of code, works only on a mac. Enjoy.

If you don't know what a mooninite is... http://en.wikipedia.org/wiki/2007_Boston_bomb_scare

Press Esc to exit.

Source Code in Processing:

import com.sun.awt.AWTUtilities;
PImage mooninite;
void setup(){
  size(screen.width, screen.height);
  frame.removeNotify();
  frame.setUndecorated(true);
  AWTUtilities.setWindowOpaque(frame, false);
  mooninite = loadImage("mooninite.png");
  imageMode(CENTER);
}
void update(){
}
void draw(){
  loadPixels();
  for ( int i = 0 ; i < pixels.length ; i++ ) pixels[i] = 0;
  updatePixels();
  image(mooninite, mouseX, mouseY, 50,50);
}