Clamshell patterns you need to alternate. you can use one or several in on one quilt. Once you get them in place quilt one row then check and make sure because of fabric movement that you don't have to move the next row a little. Use trim or fill to cut the ends off.
Clamshell pattern are really unique and step up a quilt when you learn to use them!
Designer Info:
THIS PATTERN DESIGNED BY
NANCY HAACKE
WASATCH QUILTING
801-546-3929
COPY RIGHT