self << (@double_bpm_button = GuiButton.new.set(:scale_x => 1.0, :scale_y => 1.0, :offset_x => 0.0, :offset_y => 0.0, :background_image => $engine.load_image('images/buttons/double.png'), :background_image_hover => $engine.load_image('images/buttons/double-hover.png'), :background_image_click => $engine.load_image('images/buttons/double-click.png')))