Optical Illusion

[Cadavillac]

Look at the animation below. If your eyes follow the movement of the rotating pink dot, the dots will remain only one color, pink.

However if you stare at the black "+" in the center, the moving dot turns to green.

Now, concentrate on the black "+" in the center of the picture. After a short period of time, all the pink dots will slowly disappear and you will only see only a single green dot rotating.

[Cadavillac]

Oops...maybe this needs to be moved to Picture Post.

*hides*