Have you tried dissappearing nine patch quilt blocks? The basic idea is you make a nine patch block by sewing squares of fabric into three rows of three squares each, so there are nine squares in your square block (hence the name).
Then, instead of sewing the block to other blocks, borders, etc, you cut it up, move the pieces around, and sew them back together in a different order. This is an easy way to produce a much more complicated pattern.
The picture in this post shows the idea. It is the back of my not quite quilted yet dragon quilt. I cut out fairly large squares of fabric, and after sewing groups of noine together, I cut the block in half in both directions. You can see from the picture that it produced different squares and rectangles in a pattern that would be a bit fiddly to sew.
So that is the easy version. This post shows the possibilities of cutting your nine patch diagonally.
I’m not sure I am brave enough to do that. All those bias cuts would stretch quite easily. I could get into a right mess with that…