I think I would cut four of the bigger panels down the middle of the black. Then put a thin red strip around that. Next I would keep the two smaller panels that are together that way & add them in the middle of the bigger panels plus on the side of each. That would make two wider strips. Then I would add the smaller panels to the top & bottom of each strip. Then add a red &then a Black border around all of it & bind it in red. You could use the left over panels for matching pillows.