This example builds a playful face entirely out of circles and lines inside an SVG, with features that wiggle and bounce. Using D3.js v5 and its `d3.forceSimulation` API, the face’s eyes, pupils, and mouth are treated as particles linked by spring-like forces, so they jiggle organically. The code defines the facial geometry through `d3.forceManyBody` and `d3.forceLink`, with the simulation ticking to update element positions each frame. Rendered in a 960×500 SVG canvas, the face emerges purely from code without external data sources.