skript help

command /list:
 trigger:
  loop all players:
   if region at loop-player is "a1" or "a2" or "a3" or "a4":
    add loop-player to {list::*}
    set {_list2} to a random element out of {list::*} 
    send "%{_list2}%"
    delete {list::*}
    delete {_list2}

command /list:
 trigger:
  loop all players:
   if region at loop-player is "a1" or "a2" or "a3" or "a4":
    add loop-player to {list::*}
    set {_list2} to a random element out of {list::*} 
    send "%{_list2}%"
    delete {list::*}
    delete {_list2}