on rightclick on sign:
	1st line of clicked block is "&6[&eCheckpoint&6]"
	if block below player is diamond block:
		set {%player%-checkpoint} to player's location
		send "&6[&eCheckpoint&6]&eCheckpointを設定しました"
		stop
	send "&6[&eCheckpoint&6]&eダイアモンドブロックの上でclickしてください"
on sign change:
	line 1 of event-block is "cp"
	set line 1 of event-block to "&6[&eCheckpoint&6]"
	set line 2 of event-block to "&7(rightclick here)"
on rightclick:
	player is holding diamond
	if name of player's tool is "§b§lCheckpoint":
		teleport player to {%player%-checkpoint}