on right click holding a nether star:
   name of held item contains "テレポートスター"
   loop all items in player's inventory:
      if name of loop-item contains "テレポートスター":
         if loop-item is equal to nether star:
            remove 1 of loop-item from player
   set {_temp} to random integer between 1 and 10
   if {_temp} is between 6 and 10:
      message "テレポートに成功しました！" to player
   teleport the player to the location (~.~, 100, ~.~)
   else if {_temp} is between 1 and 5:
      message "テレポートに失敗しました・・・" to player