I wanted a RW&B. I pulled 2 1/2" strips in red and white (for me Pink to dark Red and Cream- Beige-lt browns)
I sewed Width of Fabric one red and one white. Then sub cut to 4 1/2" These were my rails. I used a 4 1/2" center sq of blue.
About half way through I miss cut a bunch of my R&W strips at 2 1/2" so just make them into 4-patches and kept going.
http://ozarkcastle.blogspot.com/2010...lock-with.html
http://ozarkcastle.blogspot.com/2010...-was-your.html
my blog has posts on the progress of this top.