If your eyes follow the movement of the rotating pink dot, you will only
see one color, pink.
If you stare at the the black + in the center, the moving dot turns to
green.
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.
It's interesting how our brain works. There really is no green dot, and the
pink ones really don't disappear. This should be proof enough, we don't
always see what we think we see.
