This SVG visualization depicts a stylized sunrise and sunset cycle over a layered landscape. The scene shows a sun that moves vertically while the sky and terrain gradients shift between light and dark tones, simulating the transition from day to night. The animation is implemented using SMIL animations within the SVG markup, specifically with `<animate>` elements that control the sun's position and the color stops of linear and radial gradients. The artwork uses pure SVG shapes like circles, rectangles, and quadratic and cubic Bézier paths for the landscape.