This example displays a family tree as a horizontal dendrogram, with nodes colored by generation using a custom ordinal color scale. The visualization is built with D3 v7, using the `d3.hierarchy` and `d3.tree` layout algorithms, and rendered as SVG with `d3.linkHorizontal` for the curved links. The static data is defined inline as a JSON-like object, and the chart is presented on a dark background with labeled parent, aunt, cousin, sibling, and self nodes.