AnimProxy(value, cache=False)
An anim that simply returns the value of another anim.
value is the value that can be returned. It can be a number, a function, or another anim.
If cache is True, a cached value will be called when the anim is accessed a second time without the global time changing.
The value that this anim will return.
You can assign another anim here, and it's value will be returned.