Scratch

Hmm. Well, what type of scrolling are we talking here? X scrolling, y scrolling or both at the same time?
Generally for all of them it's the same idea of changing the sprites Initial start location as stored in variables...You change the same stuff you change on scenery sprites in a scroller but just change them more I guess...

Badly explained O.O

If I come up with a better explanation I'll come back and edit this. Or maybe make an example later.