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"Seeing is believeing" ....
... or is it ?
Stare at the blinking pink dots; you will see only one color: pink.
If you look at the the + in the center, you will see a circle of pink dots and a rotating green dot!
Now, stare at the + without moving your eyes. The pink dots will gradually disappear and you will see only a rotating green dot!
There really is no green dot and the pink ones don't really disappear.
"The Magic of the Mind's Eye"
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