Hentam Saja La Labu...

Step 1 : If your eyes follow the movement of the rotating pink dot, you will only see one color, pink.
Step 2 : If you stare at the black + in the center, the moving dot turns to green.
Step 3 : Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating.

** If you can't see movement on the image, please click the image to view in a new page **

Yes, our brain constructs reality. There really is no green dot, and the pink ones really don't disappear. This should be proof enough that appearances are often illusions.
In fact, there is no movement at all, only pink dots that are showing up and then disappearing.