This example renders an animated face built from SVG primitives, including a yellow circular head with eyes, eyebrows, and an arc-based mouth. The eyebrows move up and down via chained `transition().duration()` calls, creating a subtle blinking or surprised expression. The code imports `select` and `arc` from D3 v5, uses `d3.arc()` to define the mouth’s path, and positions all elements relative to a centered `<g>` group. The SVG canvas is 960 by 500 pixels, with a blue stroke on the head and no external data source.