Scripting help to replace multiple layers randomly

Hi all,

I want to be able to replace multiple layers in an After Effects comp with footage/pre-comps from the project panel at random. So, say if I had a 3x3 grid of layers in my comp, the script would select 9 layers from a selected folder in the project at random to replace them. I imagine it to not be a million miles away from Replace with Selected Comp (opt-CMD-/), but I don't have the requisite coding knowledget to adapt it. Any help would be greatly appreciated.

Kind regards,

Tom