"Brain Cheat"

 
Try your eyes focus on the + sign in the middle of the picture .. You have to look in the pink dots that died was replaced by green spheres, whereas the original is not the rolling green dots if our eyes do not focus to a + sign
What do you see? Yes, a background image with gray, pink spots surrounded by the dead one by one alternately clockwise
Now try to concentrate totally on the mark + concentration agan .. Really focus your concentration, do not consider anything else other than the + .. What happened?
Pink dots disappear!
Yes, buletan pink disappears, leaving only green bultean revolves around the + sign .. But the moment you concentrate dispersed, pink buletan going back again