No run today, but try this out. If your eyes follow the movement of the rotating pink dot, you will only see one color – pink. If you stare at 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 if you’re lucky! There really is no green dot and the pink dots don't really all disappear at the same time.
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