Mary found this technique in a Fons and Porter Magazine and has made several variations of this. She will be teaching the technique in a 3 hour class. Mary has found that you need to use a Jenny Beyer border stripe to make this work successfully. You will need at least 4 yards to complete the blocks for a quilt top. If you do not have any Jenny Buyer border stripes. Mary does have some in her inventory for sale for the price of $10.00 per yard. you can view this fabric here in the shop.