Strange picture illusion

This morning I uploaded a picture to my instagram here.

I actually made this image as part of my gif to moire maker processing sketch I am developing, but I noticed whenever you scrolled or moved the image on your screen, it would make quite strange bands, similar to the magnetic fields around a bar magnet. Have a look at it and try scrolling up and down to see if it works for you!

Here’s a video of the gif to moire in action.