This example creates a Halloween-themed Jack-o’-lantern face using D3.js. It shows a black-and-white face with red mouth, distinct ears, and animated eyes, all rendered as overlapping circles on a green background. The code uses D3’s `selectAll` and `join` methods to bind circle and rectangle data arrays to SVG elements, setting each shape’s position, size, and fill color. A black rectangle represents the collar below the face. The visualization is built from static data arrays defined in the `index.js` file, using D3 version 7.8.5.