This animated Bob Ross–style landscape shows a sun setting over layered mountains and an ocean, with a full day-night cycle driven by synchronized color and position changes. The scene uses pure SVG primitives—`rect`, `circle`, and `path` elements—with `linearGradient` definitions for the sky, mountains, sun, and ocean. Smil `<animate>` tags continuously shift gradient stop colors, the sun’s vertical position, and its opacity to simulate dawn, daylight, sunset, and darkness. The entire composition is declarative markup, requiring no JavaScript, and renders responsively in a 960×500 viewport.