brain game

slowly move your eyes  around  this picture. does it look  like the   diagonal rows of shapes are gently swaying back and forth  your eyes interpret  the white and black edges on the sides of the blue  shapes as light shadow. But because  they  change from row  to row your brain  is always reinterpreting where  it thinks  the shapes should be. The result? A strange  saying  motion as your brain mentally move the shapes to where it thinks they should be placed.  form called national geographic kids  https://heavy.com/streaming/2019/11/stream-brain-games/