Let's make a face with D3.js!
This example builds a simple yellow face using D3.js v5 and SVG shapes, with a large circle for the head, two smaller circles for eyes, rectangular eyebrows, and an arc-generated mouth. The eyebrows animate by translating up and down using chained `transition().duration()` calls on a group element. The code uses D3’s `select`, `arc`, and attribute-setting methods to construct the static elements, while the animation relies on D3’s transition system applied to SVG transforms. The data is hardcoded as constants for spacing, offsets, and radii, and the scene is centered within a 960×500 SVG canvas.