on gamemode change to creative:
 broadcast "&4%player% switched the gamemode to &2Creative"

on gamemode change to spectator:
 broadcast "&4%player% switched the gamemode to Spectator"

every 7 minutes:
 broadcast "&7&lサーバーのDiscordはこちら→ https://discord.gg/6q9qvjR"

every 20 minutes:
 broadcast "&4&l/menu &7&lで便利な機能を持ったメニューを開けます"