If you look at the quilt you can see the snail's trail block. It looks like the last round of triangles has one edge that makes part of the side, the triangle tip has the background coloured triangle sewn on the top and rectangle sewn on the other edge with a triangle on the end. Pretty easy if you draw it out on graph paper.
Last edited by Tartan; 03-10-2016 at 09:18 AM.