A spinning orthographic globe displays country boundaries from the visionscarto-world-atlas TopoJSON dataset, with a graticule and sphere outline. Using `d3.geoOrthographic` and `d3.geoPath`, the projection rotates continuously via state updates, reducing the longitude by 0.2 degrees per frame. The animation is driven by `requestAnimationFrame` calls within a reactive state management system, while `topojson-client` converts the TopoJSON features for rendering.