This example shows a tiny force-directed graph with three nodes (Alice, Bob, Carol) and two directed links, animated as the nodes repel and attract each other within an SVG canvas. The simulation uses D3's `forceSimulation`, `forceManyBody`, `forceLink`, and `forceCenter` APIs to calculate positions each tick. Avatar circles and connecting lines are rendered as SVG elements, with coordinates updated directly from the simulation's `tick` event.