How big will your project be?
Personally, I like the pink scraps forming a pattern. I think no matter what you do, the eye will be drawn to the brightness so might as well make it a defining feature.
If you keep the greens together, will the pinks meet up more? It looks like they will continue to form the matching opposite direction thingies in both horizontal and vertical directions... maybe play together with a couple more rows to see what secondary patterns emerge before you make up your mind.