Image seems to be moving (Image source: Playback / Buzzfeed)

It's not a GIF, much less a video. If this image - which seems to be in constant motion - has caught your attention, it means your eyes are working very well and have just shown you one of the best examples of optical illusion.

Psychedelic designs are some of the models that best present what the human visual system can do: “cheat” and show something that doesn't really happen - like in this case above, waves that keep moving, even if the image is static. . For the most attentive, this figure can also be a good tip: don't trust everything your eyes see.