Custom Window Message Show Up

#==============================================================================
# * Custom Window Message Show Up
# by dsiver144
#==============================================================================
class Window_Message
  #--------------------------------------------------------------------------
  # * alias method: update_placement
  #--------------------------------------------------------------------------
  alias_method(:dsiver_update_placement, :update_placement)
  def update_placement
    dsiver_update_placement()
    self.opacity = 0
    open_and_wait
    des_y = @position * (Graphics.height - height) / 2
    self.y = des_y + height
    contents.clear
    self.contents_opacity = 255
    while self.y > des_y
      self.y -= 10
      self.opacity += 20
      Fiber.yield
    end
  end
  #--------------------------------------------------------------------------
  # * alias method: close_and_wait
  #--------------------------------------------------------------------------
  alias_method(:dsiver_close_and_wait, :close_and_wait)
  def close_and_wait
    des_y = @position * (Graphics.height - height) / 2 + height
    while self.y < des_y
      self.y += 10
      self.opacity -= 20
      self.contents_opacity -= 20
      Fiber.yield
    end
    dsiver_close_and_wait
  end
end # Window_Message