This example renders a simple zigzag line chart using D3’s SVG line generator, which maps each coordinate pair from a hardcoded array of alternating y-values (150 and 50) onto a polyline path. The visualization is built within a React setup, where the D3 `d3.svg.line()` API defines the x and y accessors before generating the line data. A separate React component, `Lips`, draws two quadratic Bézier curves to form a mouth-like shape, though it is not integrated into the main chart. The page uses D3 v7 and React 18 via CDN links, with no external data source.