4) Do you see gray areas in between the squares? Where did they come from?
5) You should see a man's face and a word. (Tilt your head to the right)
6) If you take a look at the picture, let me tell you, it is not animated. Your eyes are making it move. To test this, stare at one spot for several seconds and everything will stop moving or look at the black center of each circle and it will stop moving but move your eyes to the next black center and the previous one will move after you take your eyes away from it.