Hope you're going to make this a sew along for all of us! .... start with the original fabric, and your pile of paper plates! :) Pleeeeeeeease? :)
I did my 4PP with a repeat about the same as yours, and didn't have quite the full 4 repeats.
Here it is ....
http://www.quiltingboard.com/t-114907-1.htm
Sashings will be a black with gold paint spatters and purple cornerstones.