command /levelup:
    permission: sk.level
    trigger:
        add 1 to {level.%player%}

command /levelc:
    permission: sk.level
    trigger:
        send "&a現在のレベルは%{level.%player%}%です"

command /level [<number>]:
    permission: sk.level
    trigger:
        if arg 1 is set:
            set {level.%player%} to arg 1
            send "&a現在のレベルは%{level.%player%}%です"
        if arg 1 is not set:
            set {level.%player%} to 0
            send "&a現在のレベルは%{level.%player%}%です"