This example displays 2022 US auto sales by brand as a pie chart, with each slice’s color, percentage, and total sales in thousands labeled in a legend. It loads CSV data from a Gist URL using `d3.csv`, then uses `d3.pie` and `d3.arc` to generate the SVG paths, with `d3.scaleOrdinal` assigning colors. The legend, built with SVG rectangles and text, shows each brand’s name, percentage of total sales, and absolute count. The chart is rendered synchronously in SVG within a static HTML page, with styling defined in an external CSS file.