VB.net writing a simple class

[wozzizname]

I'm writing a simple target shooting game - I've designed a target (bullseye style with concentric rings), but need to make this design into a class which can be moved up and down on a timer, and have different scores depending on which ring is hit . I'm really struggling to convert the target I have designed on a separate form into a class I can use in the main game program - any advice for me ?
Hope that isn't too confusing a description...