My friend show this at our sewer's meeting. I do NOT understand why anyone would want to have ALL THOSE BIAS EDGES?? That can be absolutely catastrophic Bias edges are NOT your friend and unless you are experienced, trust me, your block MAY come out wonky. Keep it simple and make the pinwheel with 2 sets of two squares, draw a diagonally line, stitch on each side of the line (HST)and you will have NO bias edges to deal with. I have an older computer so I am not able to watch videos online but to me with 28 years of experience of quilting, this is one of the wackiest ideas I have every heard.