I made 60 pinwheels recently and came up with a design in EQ. It is a baby quilt that I made for my best friends first child - a beautiful baby girl born June 29th. When I asked her if she had a preference for colors all she said was BRIGHT!!
I used a P&B White on White for the background and chose 12 Fat Quarters from the stash that were a great representation of primary colors.
It was a lot of half square triangles - but I think they came out great.