Optical Illusions - Circle, blinking, pink dots to green

Let your eyes follow the movement of the rotating pink dot, you will only see one color, pink.

Now, stare at the the black plus sign ("+") in the center of the image. First, the moving dot turns to green. Then as you continue to stare, all the pink dots will disappear, and you will only see only a single green dot rotating. This can happen in different ways (including different ways for same person in successive viewings):

Because this is an effect of neural fatigue, minor gaps in concentration can cause the circle of pink dots to reappear (and disappear again).

Holding your visual concentration, shift your gaze away from the center of this image. The pink dots reappear, but you may also see a full circle of green dots centered on your new focus point.

Image for optical illusion