Fork of Let's make a face with D3.js!
A yellow smiley face fills an SVG canvas, with animated eyebrows that move up and down via chained transitions. The face is built entirely with D3.js v5 selections and shape generators, using `select` for DOM manipulation, `arc` for the mouth path, and SVG `circle` and `rect` elements for the face, eyes, and brows. The code computes positions from the SVG’s dimensions and centers a group with a translate transform. No external data is used; the visualization demonstrates fundamental D3 update and transition patterns.