Screen animation Command

This suggestion has probably been mentioned in a post already but I would like to suggest a command that you can use screen animations like the totem of undying effect. I am not just talking about the totem though, I'm talking about all of the screen animations like the powder snow freezing effect, the darkness effect around your screen when you go deep under ground, etc.

I would imagine the command would look something like this:

/screenanimation @~ (screen animation code file) (duration)

or use the play animation command but have it as an alternate path.

/playanimation @~ (screen or animation) (file.path) (next_state: string) (blend_out_time: float) (stop_expression: string) (controller: string)

or use the camera command and have a alternate path

/camera @~ animation (file.path) (duration)

The reason why I would like this is because of a horror game I am working on and I was going to figure out how to add a screen animation realizing that the command does not exist.

If possible, It would be nice to have a static screen animation to go with it as well.

Thank you for your time and I hope that something like this would be added:)