Moving image

4 separate paragraphs were overlapped, and each is revealed by a visual

I found this website and it explains how these illusions are done. It doesnt tell you how to do them on the other hand but it gives me a sence of what to do... The illusion appears to be blurry but actually there are 6 frames of an animation. These frames ae laid out in spesific way where each frame is cut into thin lines thatyou can see. There is spesific space between each line. And the overlay has the same space between each line so the black n white lines match perfectly. As you move the overlay horizontally through the 6 frames it creates movement.

http://www.dumpert.nl/mediabase/101421/86355e6c/geanimeerde_optische_illusie.html

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