Scrolling background?

I have a scrolling background for a shot I want to draw. I want the background to cycle between 2 drawings while the characters do their actions. Is this possible?

I assume you are using Storyboard pro edition.You can simply split the scene and panning BG on each panel. While keeping camera move and transform of other object using ‘copy layer start …’ or ‘copy layer end …’ option from layer option.