One block, made like any TATW block (find directions from Bonnie Hunter here -
http://quiltville.com/scrappytripspf.html) and with dark color on diagonal, light colors elsewhere. I used a 10x10 setting (she says 81 blocks, but TATW needs an even number of blocks) and 2" blocks for a quilt that's 120x120 - can always make it smaller though.