This example showcases a playful, animated face built entirely with D3.js v5. A large yellow circle forms the head, with two smaller circles acting as eyes that perform a sequence of timed transitions, moving and settling into place. A mouth is drawn using D3's `arc` shape generator, creating a curved path. The visualization demonstrates D3's core selection, SVG element creation, and the `transition` API for smooth, time-based animation, rendered directly within an HTML page.