This example shows a donut chart that distributes categorical data into seven colored arcs, with each slice labeled by its corresponding category name. It renders directly to a Canvas element using the `d3.arc` and `d3.pie` APIs from D3 v4, with data loaded from an external TSV file via `d3.requestTsv`. The chart translates the Canvas context to center it, fills each arc with a distinct color from a predefined palette, applies white stroke separators, and places labels along the inner ring using `labelArc.centroid`.