renpy/doc/reference/functions/renpy.layer at list
From Ren'Py Visual Novel Engine
renpy.layer_at_list
| Function: | renpy.layer_at_list | (at_list, layer='master'): |
This sets the layer_at_list, an at_list that is applied to the given layer as a whole. This can be used to do things like moving the layer around, or zooming it in and out.
Note that this interacts poorly with MoveTransition.
Example
$ renpy.layer_at_list([ Move((0, 40), (0, -40), 1.0, bounce=True, repeat=True) ])
