This example shows a donut chart displaying six data categories labeled District A through F, with values assigned as static data in a d3 array. The visualization uses `d3.arc` to create the donut shape with an inner radius of 40 and outer radius derived from the viewport, and `d3.pie` to compute the angles for each segment. The chart is rendered as an SVG appended to the body, with each slice filled in steelblue and white strokes, while custom text labels are positioned using `arc.centroid` and rotated based on the slice’s start and end angles. The color scale `d3.scaleOrdinal` defines a range but is not used for slice fills in the code.