This is a 3 color version.
http://www.quiltingassistant.com/windblownsquare.html
It is 9" and I wouldn't make it like the instructions. I would cut 8 white squares, 4 blue & 4 yellow at 4". Mark a diagonal line on the back of all 8 white squares and lay them face down on all the colored squares and sew as directed on my earlier post.