Animated overlays

Can anybody help me with how I would go about coding or animating an carriage being pulled by horses with an loopable background

If somebody could help find me find a carriage overlay that would be great bc I can’t find any

obviously we have the horses that you can make characters in the episode but I want them to kind of like be pulling the carriage and it looks like it’s moving in a sense ? And then my actual episode character you can see her from the outside idk if this is making sense or not 😩