Hi, I just want some help about combat.

My problem is I got npc's in a single area and I attack one, while i'm fighting it I attack another one and it works too, I want to do it like, when your attacking one npc in a single area you have to wait till your out of combat till you attack another one, "You are already under attack" that thing.

It would be great if someone could help me out with this explain a bit how I could get this to work.

Thanks