As described in Douglas Hofstadter’s book ‘Godel, Escher, Bach’, this is what happens when you connect your camera to your TV and point the camera at the screen. The spirals are created by tilting the camera.

Source: https://inv.nadeko.net/watch?v=Y-gqMTt3IUg

I’m currently reading this article here which links to the video. The article is about a zip file that contains itself.