Quiltmaker Magazine had a pattern called Whirligiggle that would work if you have good contrast for your blues – scroll down to the extras from the May/June 2010 issue:
http://www.quiltmaker.com/columns/freebie_other.html
Cottage Garden Quilts shows Shoo Fly blocks on-point that would look great with your blues (as would many other blocks set on-point) – scroll down at this site:
http://new.cottagegardenquilts.com/free.html
Robert Kaufman Fabrics offers a free pattern from Darlene Zimmerman called Happy Days that has alternating pinwheel and patterned blocks:
http://www.robertkaufman.com/quiltin...py_days_quilt/