magic eye.
© 2007 Jamie Zawinski <jwz@jwz.org>

Hey kids, here's something fun to try!

Remember those Magic Eye "random dot stereogram" things, where if you crossed your eyes just right, you could see 3D pictures?

So. Run the rd-bomb screen saver. Increase the grid size until the seed points are about two inches apart. I like -width 250 -height 220 (it looks better when the width and height are slightly different.)

Now sit about a foot away from the monitor, and cross your eyes slightly so that two of the boxes merge into one, just like you'd do with a random dot stereogram. Now it looks like your monitor is a window and the seething pattern is about ten feet away.

Ooooooh, trippy.

Keep this up for a couple hours and it'll be time for lunch!