[VX] Cannot see rectangle

[action]

Hello. I am creating a script to show a map(um... the picture kind.) and your position according to your current map(sprite kind). But my problem is that when I create a rectangle and fill it, I can't see it. Maybe you can help me.

Script:

#----------------------------------------------------------------------
# Begin
#---------------------------------------------------------------------------
module Glue
  POSITION_COLOR = Color.new(0, 0, 0, 192)
end

class Game_Map
  #--------------------------------------------------------------------------
  # * Get Map ID
  #--------------------------------------------------------------------------
  def id
    map_infos = load_data("Data/MapInfos.rvdata")
    @id = map_infos[@map_id]
    return @id
  end
end
    
class SpriteMap < Sprite
  
  #-----------------------------------------------------------------------------
  # Initialize
  #-----------------------------------------------------------------------------

  def initialize(viewport=nil)
    super(viewport)
    self.bitmap = Cache.load_bitmap("Graphics/Pictures/", "Map.png")
    self.x = self.x
    self.y = self.y
    self.z = self.z
  end
  
  #-----------------------------------------------------------------------------
  # Dispose
  #-----------------------------------------------------------------------------

  def dispose
    self.bitmap.dispose
    for sprite in @icons + @weapon_icons
      sprite.dispose
    end
    super()
  end
  
  #-----------------------------------------------------------------------------
  # Update
  #-----------------------------------------------------------------------------

  def update
    self.bitmap.clear
  end
end
#-----------------------Scene----------------------------
class Scene_MapThing
    def main
      Graphics.wait(1)
      initialize
    end
  
    def initialize(viewport = nil)
       bitmap = Bitmap.new(200, 200)
      @viewport = viewport
      @x = 100
      @y = 100
      [color=red]bitmap.fill_rect(bitmap.rect, Glue::POSITION_COLOR)
      map_rect = Rect.new(100, 100, @x, @y)[/color]
      @mapic = SpriteMap.new(@viewport)
      @mapic.x = 50
      @mapic.y = 90
      update
    end
  
    def update
      Graphics.wait(1)
      update_position
      if Input.trigger?(Input::C)
        $scene = Scene_Map.new
      else
        return
      end
    end
  
    def update_position
      @Map = $game_map.map_id
      if @Map = 002
        @x = 200
        @y = 200  
      else
        @x = 200
        @y = 200
      end
    end
  end

My rectangle instances are in red.
If you could help, that would be great!

Thanks in advance
-LonelyElf