Mystery Quilt: ???

I've never done a mystery quilt before but Prairie Stitches Quilt Shoppe made it sound so interesting.  In the first session we  needed to pick out fabric (light, dark, and 2 mediums) and were given the beginning steps of the pattern.  The next session is this Saturday and I've managed to cut out some of the fabric and sew a few of the units together but I'm really curious as to how the blocks will be assembled.

The next session is this Saturday and I've managed to cut out some of the fabric and sew a few of the units together but I'm really curious as to how the blocks will be assembled.

Danette