Is random wallpaper possible?

First, I have 24 automations setting the wallpaper randomly with short cuts. Can i do the same with scriptable . Set the wallpaper every 30 min with zooming the wallpaper all the way out. The more I type this message i know how to do 80% of it . if apple will let be run the short cut on a 30 min timer. Zooming the wallpaper out is what i dont know.