This example shows a family tree with three generations, using colored circles to represent individuals and curved paths for parent-child relationships. The layout is generated from a flat array of child-parent pairs using `d3.stratify()` and `d3.tree()`, with nodes positioned according to the tree's computed x and y coordinates. Circles are colored via a custom `getColor` function based on node depth, and labels are added as SVG `<text>` elements. The visualization uses D3 v5 and renders entirely as SVG, with a fixed 960×600 viewport.