This example visualizes COVID-19 case counts for multiple countries across the years 2019–2023 as a multi-series 3D bar chart. It renders the data using the d3-x3d library, which combines D3.js v5 with X3DOM for WebGL-based 3D graphics. The visualization reads CSV data from a GitHub gist, parses it with `d3.csv`, and binds it to the chart via the `datum()` method. The chart is displayed inside an HTML div with styling, allowing interactive rotation and exploration of the three-dimensional bars representing case numbers.