The following images are nested inversion of circles. Start with set of circles, then invert them with respect to themselves. Take the result and apply inversion with respect to starting circles again. This process can be repeated forever.
Circles retain their color after inversion.
In the first image for example. It starts with seven circles and let's call it generation 0. Invert generation 0 circles with respect to generation 0 we get generation 1. Note that inversions are always done with respect to generation 0 circles. The image shows the result after 4 inversions.