I'm really stumped. I'm mostly self taught but I don't know how to do this.

I'm seeing a lot of things that call on events but nothing that tells me how to make one.

I'm trying to get it so five NPC's can be moved from their default locations to five other positions (henceforth called position A, B, C, D, and E) and can be rearranged at any time all via conversations.

Doing that on it's own is pretty simple, but I want to set it up so that if NPC 1 is in position A and NPC 2 is in position B and I tell 2 to go to A, A will automatically move to position B effectively trading places.

Anybody know the best way to set that up as an event?