i tried it, but it's not the one i want.
What i want is an event wherein 1 party (7 players) will talk to the npc and then they will be warped in a waiting room. After that when another team registers, The 2 party will be warped in the guild maps, ex guild_vs2. 1 team will be warped on the left side, 1 team will be warped on the right side. They won't be able to move far, they will have 10 secs to get ready then the battle will automatically start.