An animated SVG landscape depicts a sunrise-to-sunset cycle over layered terrain. The code uses a `<radialGradient>` sky backdrop and two `<linearGradient>` landmasses, with `animate` tags on gradient stops and a `circle` element to move the sun vertically over 15 seconds. The scene renders entirely in SVG, with paths defining the curved hills and a repeating timeline for the color and position transitions.