box << clear_button=GuiButton.new.set(:float => :left, :scale_x => 0.07, :scale_y => 0.7, :offset_x => 0.02, :offset_y => -0.3, :background_image => $engine.load_image('images/buttons/clear.png'), :background_image_hover => $engine.load_image('images/buttons/clear-hover.png'), :background_image_click => $engine.load_image('images/buttons/clear-click.png'))