1. Follow the movement of the rotating pink dot - you will only see one color: pink.
2. Then stare at the black + in the center, and notice that the moving dot turns to green.
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 see only a green dot rotating!
4. When you break your gaze, the green and pink dots will be separately visible for a short time.
It's amazing 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.
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