nevermind. just going to try passing in FALLING-OBJECT as it is the image, and use the ball structure to mainly keep track of the y-positions, which will ultimately set the placement of the image. there's no way to place a structure onto a scene which makes sense (well i guess you could pass in a structure that has an IMAGE as one of its properties)

my problem was that i assumed what we were actually placing on the scene was the ball structures themselves and manipulating those structures directly. However,  think we are supposed to manipulate the image indirectly through the use of structures.