command /setline [<number>] [<text>]:
    permission: sign.setline
    permission message: Nie mozesz tego uzyc
    trigger:
    if arg 1 is set:
        if arg 2 is set:
            set {_sign} to target block
            set line arg 1 of {_sign} to "%coloured arg 2%"
            stop
    send "&cPoprawne uzycie: /setline linia tekst"