It's pattern #166 from her book 300 Paper-Pieced Quilt Blocks. It comes with a CD. I thought it was easy. At first it seems awkard but once you get a rhythm it goes pretty smooth. Her instructions are pretty easy to follow. Be sure to get the added quater inch ruler that is mentioned. It makes is alot easier. I don't see how you can do it accurately without it. I recommend this technique to anyone.