This is one of several entries on this list that will leave you convinced that it's an animated gif. In fact, it's just a static image in which the dots appear to wobble as your move your eyes. Definitely not an advisable wallpaper pattern.
15. Cafe Wall
The Cafe Wall illusion gives the appearance of wonky lines around squashed quadrilaterals. Look a little closer though, and you'll see that all the squares are normally-shaped, and all the grey lines are perfectly straight.
This is one of several entries on this list that will leave you convinced that it's an animated gif. In fact, it's just a static image in which the dots appear to wobble as your move your eyes. Definitely not an advisable wallpaper pattern. 
The Cafe Wall illusion gives the appearance of wonky lines around squashed quadrilaterals. Look a little closer though, and you'll see that all the squares are normally-shaped, and all the grey lines are perfectly straight.