Mark Wyner Won’t Comply 
These cubes aren’t moving or changing (as implied by the arrows). At all. Not even a little. Other than the color toggle, they remain constant.
(Credit: Ja Gari Kin)
EDIT: added content warning because of the flashing.
Ian Tindale@markwyner ah, but what if those arrows were translated from English to a language I don’t know, like Korean or American or Mongolian? If foreign arrows were used, I’m sure the hypnotic suggestions would fall flat on their face
The Evil Microwizard@u0421793 @markwyner It still works even if the arrows are covered... because it isn't a simple black/white toggle. A gradient is animated across the "border" of the square in different ways according to the "movement" it wants you to see.