Embroidered Collage

I began adding color by extending the largest expanding circle with the greens, deliberately not letting it intersect the centers of the other circles for more interest.  That wasn't quite enough, so I made the center green as well.  I was really pleased with this one.  The next page I tried to have red and blue intersecting circles make purple.

I added colored lines inbetween black ones and then tried circles expanding through a color progression.  This one didn't scan very well.

This doodle with the same idea but a different color range worked better.  Then I decided to space out the colored rings, placing them as the ripples traveled outward.  Red always looks so good with black and white.  The result was kind of blah until I made the one red circle thicker.

Maybe some additional patterning next.  I'm not sure...

See the previous three spreads.