One idea was to do an asymetrical log-cabin using a single green silk fabric thinking the weave of the silk would give it texture and different shadings. Tried it, but the silk was too fiddly and the whole looked very boring.
Another idea was to use a star block in sizes from 4 to 8 inches, cleverly coloured to get some optical illusion happening. Tried to, but very small pieces of fabric resulted in corners and points not meeting despite great attention to detail, so it also ended in the bin.
Now with time short, I began again yesterday morning and finished a short while ago. Based on a traditional star block, it is actually appliqued not pieced (not time and too small) and slightly distorted. Not blue as originally planned, and not really my usual colours at all, but made with a single piece of very brightly hand dyed fabric from my stash. It is most unlikely to win any viewer's choice, but as there were only a few entries for the challenge, one more is good.

Somehow one does not expect large dogs to be sooks, but mine just a great big softy. She loves to lie on things - shoes, socks, dirty clothes left on the floor, jumpers thrown off in the garden when it gets too hot - anything really. She kept me company today as I stitched, and these are bags with quilts inside, all ready to go to the show..........