I would just do 12" squares.... put sashing to left and right, then strips between them top and bottom in coordinating color...tan, gold, grey??
Then do the piano key border around the sashing and done! Simple, quick, and makes good use of what you have without too much detail. If you feel ambitious, set the blocks on point.
I've done a lot of charity quilts with this "pattern" and folks seem to really like them. The pattern makes good use of busy fabric.