This example presents a donut chart visualization of Auto MPG dataset records, showing the distribution of composers in the data. The visualization uses Vega-Lite API to construct an arc mark with theta encoding and count aggregation, styled with a pastel color scheme and semi-transparency. Data is loaded asynchronously via D3’s CSV parser from a GitHub Gist, and the chart is rendered with an SVG renderer configured through Vega-Lite, with tooltips enabled via Vega-Tooltip’s handler.