This example demonstrates a smiley face whose eyebrows animate using fundamental D3.js DOM manipulation. The SVG is selected via `d3.select` and styled with a red background. The code uses D3 v5 and renders the face as SVG elements, with the eyebrows moving through dynamic attribute updates. The fork builds on a tutorial approach, showing how D3 can bind and modify visual properties directly in the DOM without complex data joins or scales.