A yellow circle face with black stroke holds two black eyes and a smile-shaped mouth. Its thick black eyebrows rotate inward and outward in a looping animation, tilting up and down around their centers. The piece uses D3.js v7 with SVG elements, applying chained `transition()` calls to animate the `transform` attribute of each eyebrow line over two-second intervals. The mouth is drawn as an arc path using D3's `arc()` generator.