Optical illusion creates animation using lines and masking (aka scanimation)
Whoever figured that out was pretty smart. I've seen a book of these at the bookstore and there are more videos online if you search. Each animation is 6 frames long.
"Serial Bus is a place for me to dump interesting links that I find."
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo."