Read the instructions at the top, and then figure out what's going on.
http://www.patmedia.net/marklevinson/cool/cool_illusion.html
http://www.patmedia.net/marklevinson/cool/cool_illusion.html
TedTheLed said:pretty neat..those gray squares really threw me though..I couldn't believe it, even when I masked the screen with my hands..we so much see things the way we tnhik they shulod be..!
dfred said:if you're good at defocusing your eyes it's possible to see through the trick. Apparently getting rid of the sharp definition between the squares does it.