The stills don’t have anywhere near the punch that the ring rendering does, but the nebulous billowy cloud like effect is nice. I’m using the same code to pick the colors, just replacing stroke with fill. I’ll have to keep this in my back pocket and see if there is something I can pull this out for in the future.
Bouncing Circle Grid
Grids of circles
Circled out
Infinite Flow
Bouncing circles
More of the stereographic circle series.  In this one, the circles are defined by iterating over a circle in 3 dimensional space.  That circle is bouncing up and down in the vertical direction.The changing shape and disappearance come from the circle leaving the interior of the sphere and returning bit by bit.
Related Images:
More animated Circles
This page is just playing around with linear paths through the circle space. Â I’ve tried some more complicated shapes but they quickly get too complicated.