Look at this lady's nose for 10 seconds, then blink rapidly while looking at a light surface in the pic. Her face will suddenly appear in full color!
First start by staring at the black cross in the center. . . notice how the strange rotating blank spots rotate through the pink dots?
These dots may look like they're changing color while orbiting from the center. But try to focus your eyes on a single dot. . . you'll see there's no rotating or color change at all.
Cross your eyes and you should be able to see a familiar face. Hint: Who was the King of Pop?
Start by staring closely at the center yellow dot, now move your head closer to the computer screen and you'll see the pink rings begin to rotate. This is called a Pinna-Brelstaff illusion, which is due to the "flaws in our peripheral vision".