A fork of an SVG fundamentals exercise depicts an animated sunrise and sunset across a stylized landscape. The visualization uses a radial gradient for the sky and two linear gradients for layered terrain paths, all defined within SVG `<defs>` elements. A `<circle>` element represents the sun, and SMIL `<animate>` tags oscillate its vertical position and the gradient stop colors over a 15-second loop, transitioning from aliceblue to indigo and steelblue to simulate the changing sky. No external JavaScript libraries are used; the rendering relies entirely on native SVG markup.