This is illusion images created with flash.

Color trickSwitch the color of A and B by clicking on it.
Look at the black point on A for 30 seconds,
then look at B. You will see image with full color.
Color trick

This is Spot the difference created with flash.

MovieThe 2 images switch slowly.
Movie
ChangeThe 2 images switch every few seconds.
Movie
Access counter
41308
37614
42381
40433
44060
40375
41426
10099
1133444840
05:25:33