I am not sure this will be the final layout design, but it is what I have done so far.
These squares have no rhyme or reason. They were all made with scraps of yarn and squares I have tested for other people or squares I made from afghans I thought I wanted to make then discovered I did not care for making the square.So, instead of donating them as I would usually do, I decided to gather them and make a ghan of them myself. This is the results so far. There are all different weights of yarn used and different sized hooks.