on right click on sign:
	if player is on ground:
		set {_cooldown} to difference between {cp.%player%.lastused} and now
		if {_cooldown} is less than 1 seconds:
			send "&c1秒以上開けて設定してください"
			stop
		set {checkpoint.%player%} to location of player
		set {cp.%player%.lastused} to now
		send "&aチェックポイントを設定しました"
		execute console command "playsound block.note.pling master %player% ~ ~ ~ 1 1 1"
		wait 4 tick
		execute console command "playsound block.note.pling master %player% ~ ~ ~ 1 2 1"
	else:
		send "&c空中でチェックポイントを設定することはできません!"