This example displays an orthographic world map that rotates continuously on a black background, showing country boundaries and graticule lines. Using D3 v5, it combines `geoOrthographic`, `geoPath`, and `geoGraticule` to project and render geographic features, with a `timer` driving the rotation. Land masses are colored light green and highlight red on hover, with country names from a TSV lookup. The map uses TopoJSON data from world-atlas and supports zooming via d3.zoom.