ok so you can do something like this
BACKGOUNDNAME
@overlay OVERLAYNAME create
coordinates (like when you put a character in screen)
@overlay OVERLAYNAME opacity (0, 0.1, 0.2, 0.3, 0.4 0.5 … 1) in (seconds)
I’m new but I think that I allready know most of the things to coding in episode so if you have any doubt you can send me a mail