I'm considering felt grass for scenery. The colors I have access to are green, light green, yellow, and red. What would be a nice combination for grass that is in full glory? Btw, I have no access to ground foam. I am also considering using saw dust for scenecking. I can easily get a sack. But I'm worried if I use latex paint to color the saw dust. Will they clump together? Or do you have a tip on how to color saw dust?