This example shows a static CSS flag followed by an animated SVG flag with a waving effect. The first SVG renders three colored rectangles and a black line using plain SVG elements. The second SVG attempts to animate the flag’s shape by referencing a wave path in `<defs>` and applying `<animate>` elements, though the animation targets the `d` attribute on rectangles, which does not visibly change their geometry. It uses the SVG API for shapes and animation, without external libraries.