It's exactly the same in Scrippy.
Objects in Scrippy
Stationery is composed of objects. There's an object that contains the background image, and there's one for sound. Scrolling text is an object, too, as is the Message Area. Everything is an object in Scrippy.
While there can only be one Message Area, you can of course combine as many background images (with transparency, for example) as you like, or even multiple sounds.

