I'm trying to use the "create background" block to create foregrounds for a scene based on a selection made before that scene (i.e. choose your scenery/arena). It works fine if I have everything on the same layer but if I have multiple layers in a scene both the background and foreground automatically go to the bottom layer and I can only change the z-order. I can't find a way to create a background on my bottom layer and a foreground on my top layer. Any ideas how to change the layer of a background using blocks?