on right click holding a nether star:
   name of held item contains "テレポートスター"
   remove 1 of nether star from player
   set {_temp} to random integer between 1 and 10
   if {_temp} is between 6 and 10:
      message "§6テレポートに成功しました！" to player
      teleport the player to the location (-428.35, 35, 953.35)
   else if {_temp} is between 1 and 5:
      message "&4テレポートに失敗しました・・・" to player