Mastodawn

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.

@markwyner
Wow. Usually these illusions break down if you cover them, but these keep working. Witchcraft!
@briankrebs

@rbos @markwyner @briankrebs The reason is that you can never fully cover this illusion.

The arrows and spinners are decoys. They don’t work at all, even when uncovered. It’s the flashing colours that do the trick.