fresh block
This example shows a spinning globe visualization that rotates continuously to display world continents. The orthographic projection rotates around the vertical axis using `d3.geoOrthographic()` and `d3.geoPath`, with the rotation angle driven by `d3.timer` based on elapsed time. The globe renders country boundaries from a GeoJSON file loaded via `d3.json`, while the SVG background is styled with a light blue color. The code uses D3 v4 for all geographic projections, path rendering, and animation timing, with no additional libraries or interactive elements.