HELP: How to loadmovie on containers with IF ELSE

Hello,

I read some IF ELSE tutorials on the forum after searching and wondered if this scenario is possible.

Supposing I have and empty clip on my movie, let’s say “containerMC”. What if I want that when the containerMC has not loaded any external MC, it will load this specific MC until another external clip is called.

if
containerMC = empty
then
loadmovie on thsi container

Something like that