I always enjoy new optical illusions. This one is a little different.

Let your gaze rest on the central fixation cross, but observe with your “inner eye”? the patches just when they disappear. With good fixation, you should see a strong greenish colour whenever the violet patch has disappeared.

When you are fixating well, after a few cycles you will actually see a rotating green spot! If your gaze is really steady, the magenta patches will disappear, leaving only a rotating green spot!

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