This example draws a smiling yellow face out of SVG shapes using D3.js v5. It constructs a circle for the head, two circles for eyes, rectangles for eyebrows, and an arc path for the mouth, all centered on an SVG canvas. The eyebrows animate upward and back down over four seconds using chained `transition` calls with a two-second duration each. The code relies on D3’s `select` and `arc` functions to build the scene entirely from static attributes, with no external data source.