on rightclick on sign:
    line 1 of clicked block is "====="
    line 2 of clicked block is "checkpoint"
    line 3 of clicked block is "[rightclick]"
    set {checkpoint.%player%} to location of player
        message "&6 チェックポイントを設定しました!"
   if player has permission "skript.admin":
       message "&7Location of player"
on rightclick with nether star:
cancel event
if clicked block is sign:
    stop
if {checkpoint.%player%} is set:
    teleport player to {checkpoint.%player%}
    stop
else:

        message "&c チェックポイントが設定されていません!"