Variables:
    {%player%.chat} = 0

on chat:
    If {%player%.chat} is 0:
        set {%player%.chat} to 1
        &7%player%&a: &f%message%
        set {%player%.chat} to 1
        wait 1 seconds
        set {%player%.chat} to 0
    If {%player%.chat} is 1:
        message "&c&lメッセージを送るためには数秒待ってください" to the player