I prewash and press my fabric. Then I cut the 7 yard piece in half LENGHTWISE and set aside half. Look for the repeat in the print and cut the repeat in the same place in the design. Sometimes, you have to cut everyother repeat to get the piec large enough. You need 8 matching pieces. then stack the cut pieces on top of each other. Insert a pin at the same place on each design in three or four seperate places. Cut the fabric into strips and then into suqares and then into triagles. This will give you 8 identical triangles for your pinwheel block. I used to teach Stack and Whack. it is an adicting pattern. The other half of the fabric is used for the borders of the quilt. Cut them lenghtwise too.