on rightclick:
    block is a sign
    line 2 of clicked block is "checkpoint"
    line 3 of clicked block is "[rightclick]"
    player is on ground
    set {checkpoint.%player1% 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 not jump"

on leftclick with fire charge:
  cancel event
  if clicked block is sign:
      stop
  if {checkpoint.%player1%} is set:
      teleport player to {checkpoint.%player1%}
  else:
      message "&cチェックポイントが設定されていません!"