First of all, tell everyone that I have seen it, I really can produce illusion! ! ! ! ! It may be that the use of people's visual nerve bugs is made. It is very cool. It is recommended to give you the specific method as follows: 1. Note the center four black spots 15 seconds - 30 seconds! (Do not look through the entire picture, but only 4 points in the middle!) 2. Then look at the wall around him (white wall) 3. Look at the eyes while quickly blinking
