I take parts of one pattern and parts of another and make a surround background for panels that have more than one part. I cut the parts to be separate and then place on a big background piece the size I want the quilt. Then I start adding blocks or pieces to fill in the background around the parts. I think it's called patch quilting. I call it no math needed. I sew the pieces to fit the space whether it is block or a chunk of fabric.