Ah, I was using difference a different way and didn't realize that it could be used like this! Thank you!

Hi there! I have two flowers, one black and one blue. I would like the blue flower on bottom and the black on top. This is easy enough- however, I would like the blue to show through in the middle of the flower, which I can't figure out how to do. I figured the way to do this is to "fill betwee...