on sneak toggle:
   if {fly.%player%} = 0:
      if {%player%.material} = 0:
         message "&4燃料が足りません"
         set {fly.%player%} to 1
      else:
         push player upwards at speed 0.9
         push player horizontally forwards at speed 1.2
         add -1 to {%player%.material}
         message "&a燃料残量 %{%player%.material}%"
         set {fly.%player%} to 1
   else:
      set {fly.%player%} to 0
on rightclick holding a iron ingot:
   add 1 to {%player%.material}
   remove 1 iron ingot from the player