Video feedback: a camera pointed at its own monitor, resampled through one rotation-and-scale per frame. The infinite regress is a consequence of the frame having been through the same map unboundedly many times, and the tonemap is what keeps the loop from running away.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and psychedelic.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.