on right click holding a nether star:
   name of held item contains "&d屋根裏部屋へのカギ"
   remove 1 of nether star from player
   set {_temp} to random integer between 1 and 10
   if {_temp} is between 4 and 10:
      message "§6屋根裏部屋へのテレポートが成功しました!" to player
      teleport the player to the location (-428.36, 36, 953.36)
   else if {_temp} is between 1 and 3:
      message "&4粉々になった・・・テレポートに失敗したようだ" to player