To see this optical illusion in it’s full capacity, wait for the animated .gif to loop to its start. You’ll know you’re there when you see a full colored rainbow appear. Now stare at the center dot for few seconds, and at one time the animation will switch. But don’t move your eyes from central dot just yet! What do you see? If you followed my procedure precisely, sooner or later you’ll find out that the animation below consists of two similar images. Only difference between them, is that one is in color, and the other is black and white. After staring at the color rainbow’s central dot, negative colors burnt in your retina, and you were able to see the black and white photo in full color!

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