on load:
    set {nicki::*} to "NikoShow" #<---- tu wpisujesz nick gracza

on command "seen":
    set {_arg} to "%arguments%"
    if {_arg} is set:
        loop {nicki::*}:
            if {_arg} contains loop-value:
                send "&cBrak informacji o tym graczu!"
                cancel event