This example shows an animated sunrise and sunset scene with a gradient sky, a moving sun, and two layered landscapes. The SVG rendering uses native SMIL animations within the markup, including `<animate>` elements that cycle the sun’s vertical position and animate color stops of radial and linear gradients. The code defines three gradients (`sky-gradient`, `land1-gradient`, `land2-gradient`) and applies them to a rectangle and two path shapes. No external libraries are used; the visualization relies purely on SVG fundamentals and CSS styling for layout.