Dianne Dye of Designs by Diane came in one Saturday to teach this design to our guild. It was suppose to be a table runner and I decided to make it a little larger so my placement were an afterthought. This is really a quick and easy pattern. Diane uses 4 1/2 inch strips. I posted to the link below. It is in her Season 1 videos called Positively Negative.
http://www.dbdquilts.com/quiltvideos.asp?V=Positive
I also found this pattern using a 2 1/2 inch strips by Eleanor Burns. Her blocks are called Twin Sisters. The blocks are smaller but very pretty. Here is the link.
http://quilterstv.com/channel/video/1255