This example displays a world map using the D3.js library, rendering countries as red paths with blue outlines on a black sphere. It uses the `geoEquirectangular` projection and `geoPath` to generate SVG paths from TopoJSON data loaded from the world-atlas dataset. Hovering over a country changes its fill to green via a CSS `:hover` rule. The visualization demonstrates geospatial data rendering with D3 v5 and TopoJSON’s `feature` method.