docs: @Override protected void resize() {
          super.resize();
          centerX    = width * 0.5;
          centerY    = height * 0.5;
          flapHeight = height * 0.495;
  
          upperBackground.setWidth(width);
          upperBackground.setHeight(flapHeight);
  
          lowerBackground.setWidth(width);
          lowerBackground.setHeight(flapHeight);
          lowerBackground.setTranslateY(height - flapHeight);
  
          upperBackgroundText.setWidth(width);
          upperBackgroundText.setHeight(flapHeight);
  
          lowerBackgroundText.setWidth(width);
          lowerBackgroundText.setHeight(flapHeight);
          lowerBackgroundText.setTranslateY(height - flapHeight);
  
          flap.setWidth(width);
          flap.setHeight(flapHeight);
          rotateFlap.setPivotY(centerY);
  
          flapTextFront.setWidth(width);
          flapTextFront.setHeight(flapHeight);
  
          flapTextBack.setWidth(width);
          flapTextBack.setHeight(flapHeight);
  
          font = Fonts.latoBold(height * 0.75);
  
          upperBackgroundTextCtx.setFont(font);
          lowerBackgroundTextCtx.setFont(font);
          flapTextFrontCtx.setFont(font);
          flapTextBackCtx.setFont(font);
  
          redraw();
      }