This pie chart shows the top 10 U.S. states by population density, with each slice colored and labeled by state, and its value displayed in thousands. The visualization loads CSV data from a GitHub gist via `d3.csv`, then uses `d3.pie` and `d3.arc` to generate SVG paths, with `d3.scaleOrdinal` assigning a fixed color palette. A legend, built with appended SVG rectangles and texts, maps each color to its state and density value, formatted using `d3.format`. The rendering is entirely SVG-based, with custom styling from an external stylesheet.