here's one idea
http://www.quiltingboard.com/t-64537-1.htm, but use your 2 colors for the borders
or this one and alternate your colors in the center squares
http://www.quiltingboard.com/t-146955-1.htm
in this one you can use one color for the frame and the other for the tiny square
http://www.quiltingboard.com/t-44132-1.htm