For this challenge my only use of “20″ was in the spokes of my central circles. I don’t know if there is a block in the library like this as I drew my own. I decided to go with the colours of the colour wheel for a bright quilt. Each block has each of the 6 colours of the wheel but in different positions and each block has colour wheel opposites in the corners and with the spokes and the surround.

Bracebridge, ON Canada