Fork of Let's make a face with D3.js!
A yellow smiley face rendered with SVG in D3.js demonstrates fundamental DOM manipulation. The face is centered within a 960x500 viewport, with its eyes, eyebrows, and a mouth built from circles, rectangles, and an arc path. The code uses the `d3.select`, `append`, `attr`, and `transition` methods to construct the shapes and animate the eyebrows, which move upward and return over four seconds. This fork of a tutorial example shows basic data-visualization primitives without external data, focusing on creating and transforming SVG elements dynamically.