This may or may not be finished, not sure if I will add color or shading, for now I like it just as it is. This is the second doodle I did at my friend's house the other day, I used a compass to make the circles within circles, then I filled the circles with patterns. Some would call this a mandala, but honestly I don't care for the spiritual implications of that word, I'm a Christian and not into Buddhism or Hinduism so I'll call it a doodle in the round :)
I especially like the outside ring with the squares and the squiggles. I'll definitely be doing more of these types of doodles. :)
This was done with a 005 and a 01 Micron pen.