073 - Optical Illusion
1) If your eyes follow the movement of the rotating pink dot, the dots will remain only one colour - pink.
2) However if you stare at the black "+" in the center, the moving dot turns to green.
3) Now, concentrate on the black "+" in the center of the picture. After a short period, all the pink dots will slowly disappear, and you will only see only a single green dot rotating.
4) It's amazing how our brain works. There really is no green dot, and the pink ones really don't disappear.
