I realized that pretty much all the bobbins I had were full of yarn, some of them with yarn I don't even have the cone of anymore. (I had donated a bunch of yarn to RISD a few years ago in a move.) I decided that to use up the yarn, I would do a series of studies, using just the neutral yarns that I had and experiment with mixing them. For structure, I used a crowfoot, also known as a 4 harness satin. It pretty much used up some of the bobbins and the rest of the warp.
The studies I did to chose the yarn for the borders of the placemats. I chose the green, which is a chenille twisted with some slubs.