I am having so much fun playing with my stencils. Here, the 28 around checkerboard is overlaid with an Islamic style cosmic mandala of 12 around. Because they share a divisor for four, some interesting alignments happen. 
Here's the checkerboard in silver, Islamic mandala in gold, and a star pattern, fives and sixes, on top in black. The stars and the mandala patterns meet up nicely in places due to their common divisor of six.I am trying to work out a design for a thirty day month. I thought I could use sixes and fives, and bring in the twelve for the twelve months of the year, but I think the 28 grid may have to go. So I am working out other ideas and colors.
More in a few days, hopefully success!
