숫자게이지 간단한 질문좀요.

비밀소년님이 만드셧던 숫자게이지바(아래)

#==============================================================================
# ■ My_Wnd_Guage
#------------------------------------------------------------------------------
#  간단한 숫자 게이지바
#                                                coded by Bimilist
#==============================================================================
class Gauge < Window_Base
  def initialize
    super(0, 0, 176, 64)
    self.contents = Bitmap.new(width - 32, height - 32)
  end
  def refresh
    self.opacity = 160
    self.contents.clear
    draw_actor_hp($game_party.actors[0], 0, 0)
  end
  def self.show
    if $my_wnd_gauge == nil or $my_wnd_gauge.disposed?
      $my_wnd_gauge = Gauge.new
    end
    $my_wnd_gauge.refresh
  end
  def self.hide
    if not ($my_wnd_gauge == nil or $my_wnd_gauge.disposed?)
      $my_wnd_gauge.opacity = 0
    end
  end
end

이건데요. 위의스크립트는 체력을 표시하는데 뭐 체력은됫고 마력나타내도록 못바꾸나요?