This example uses D3.js to construct an animated smiley face entirely from SVG shapes. It appends circles and lines to a central group, positioning the head, ears, eyes, pupils, nose, and whiskers. While the code creates the faces’ static components, a linked video demonstrates the interactive eyebrow movement. The visualization relies on fundamental D3 selection and DOM manipulation methods, such as `select`, `append`, and `attr`, within a 960×500 SVG canvas.