A disappearing 9 patch (D9P) works up nicely in 3 colors and so does a rail fence. This is a mystery quilt that only uses 3 fabrics:
http://www.equilters.com/library/mys...st3-part1.html
This is the first quilt I ever made. I've made 4 of them as baby quilts using 4.5" blocks. If you look at the last page at the layout of the whole quilt, it's pretty easy to see what to do. I assemble mine in rows, not sections.