on skript load:
    if file "plugins/pvp" doesn't exist:
        create file "plugins/pvp"
        if file "plugins/pvp/uses.yml" doesn't exist:
            create file "plugins/pvp/uses.yml"

command /pvp [<text>]:
    trigger:
        if player has permission "pvp.use":
            if arg 1 is "on":
                execute console command "gamerule pvp true"
                send "&8» &6Włączyłeś PvP!" to player
                add "%player%" to yaml list "Przez:" from "plugins/pvp/uses.yml"
                add "%year%y.%month%m.%day%d.%hour%h" to yaml list "Data:" from "plugins/pvp/uses.yml"
                add "on" to yaml list "Tryb:" from "plugins/pvp/uses.yml"
            if arg 1 is "off":
                execute console command "gamerule pvp false"
                send "&8» &6Wyłączyłeś PvP!" to player
                add "%player%" to yaml list "Przez(%player%):" from "plugins/pvp/uses.yml"
                add "%year%y.%month%m.%day%d.%hour%h(%player%)" to yaml list "Data(%player%):" from "plugins/pvp/uses.yml"
                add "off" to yaml list "Tryb(%player%):" from "plugins/pvp/uses.yml"
            if arg 1 is not set:
                send "&8» &cPoprawne użycie: &b/pvp on/off" to player
                add "%player%" to yaml list "Przez(%player%):" from "plugins/pvp/uses.yml" 
                add "Arg not set" to yaml list "Blad(%player%):" from "plugins/pvp/uses.yml"
                add "%year%y.%month%m.%day%d.%hour%h(%player%)" to yaml list "Data(%player%):" from "plugins/pvp/uses.yml"
        else:
            send "&8» &cNie posiadasz permisji!" to player
            add "%player%" to yaml list "Przez(%player%):" from "plugins/pvp/uses.yml" 
            add "No permission" to yaml list "Blad(%player%):" from "plugins/pvp/uses.yml"
            add "%year%y.%month%m.%day%d.%hour%h(%player%)" to yaml list "Data(%player%):" from "plugins/pvp/uses.yml"