This example shows a simple yellow cartoon face with eyes, eyebrows, and a mouth, built entirely with D3.js v6 and rendered as SVG. The eyebrows animate by moving up and down repeatedly over two-second transitions. The face is centered using a group translation, and the mouth is drawn with the `d3.arc` path generator. The code uses `select` and `arc` from the D3 library, with hardcoded dimensions for spacing and radius, displaying a looping motion without any external data source.