A simple animated SVG scene depicts a sunset-sunrise cycle over a stylized landscape. The visualization uses native SVG elements, including `<rect>`, `<circle>`, and `<path>` shapes, to render the sky, sun, and three layers of terrain. Animation is driven by SVG `<animate>` tags, which continuously cycle the sun's vertical position and the gradient colors of the sky and land, creating a looping day-to-night transition. The scene relies on radial and linear gradient definitions within `<defs>` to shade the elements.