I am currently making a top that may work for you. I am alternating a four patch with a piece of focus fabric the same size. Right now I am using a five inch square focus fabric, but I have also done it with four inches. Let me see if I can find pictures of both....in case either appeals to you.
...Okay, I found a D9P first that might interest you, then the next two pictures are of my four patch alternating with a focus fabric.
Dina