If you move the computer screen rapidly up and down, or use the scroll bar to move the browser window rapidly up and down, you can see the central square moving !
Showing posts with label Moving. Show all posts
Showing posts with label Moving. Show all posts
Monday, August 18, 2014
Optical illusion - moving oranges
If you move the computer screen rapidly up and down, or use the scroll bar to move the browser window rapidly up and down, you can see the central square moving !
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