on right click holding a nether star:
   name of held item contains "ネザースター"
   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 (16.5, 5, 1400.5)
   else if {_temp} is between 1 and 5:
      message "テレポートに失敗しました・・・" to player