Forgotten Bullseye(s)

I was really bored and on a random trawl through my old graphics, I came upon this piece:



Its so old that I only rendered it at 450 by 450 and I can't remember what I did to get it!

Below is another fractal, similar theme, same story (very old, can't exactly remember how it happened).



First graphic reminds me of a dartboard, the second is like one of those old spirograph patterns.