I Really Need Help Please Respond!!!!!!!!!!!

[FungusAmungus]

i really need help on an NPC i need a NPC that when a person with my tag on 'Stealth Assassins' walks into him it will warp him to a different level and then i need when someone does not have to right tag it will say go away and then when the 'Stealth Assassins' members say open everyone can get in but the guy will not allow then inafter like a sectain time limit so no more can get in but the people in say in there till they exit i need help on it