Bitmap won't appear?

[Ulqiorra]

I am making something in RMXP, and it requires a lot of bitmaps.

I need to be able to modify a bitmap in a class (@bitmap variable),
and then block transfer it to the bitmap of a window(self.contents).

The code I tried was:

[rgss] 
class Thing
  def update
    @bitmap.clear
    if @toggled
      bmp = RPG::Cache.picture("file")
    else
      bmp = RPG::Cache.picture("")
    end
    @bitmap.blt(@x,@y,bmp,@rect)
    @bitmap.draw_text(@rect,"pie")
  end
end
 
class Window_Things < Window_Base
  def refresh
    self.contents.clear
    self.contents.blt(0,0,@thing.bitmap,@thing.rect)
  end
  def update
    refresh
    super
  end
end
 
[/rgss]

*All Variables are initialized.*

I put in the draw_text to see if it was doing the block transfer on the window's end, and it is, but the block transfer on the Thing's end isn't working.

Any help?