code: @Override
      public void clear(int x, int y, int width, int height)
      {
          for (int i = x; i < width; i++)
          {
              for (int j = y; j < height; j++)
              {
                  g.setRgb(x, y, ColorRgba.BLACK.getRgba());
              }
          }
      }
docs: /*
  Graphic