A grid of small faces, each rendered as a yellow circle with white eyes and a curved mouth, fills the viewport. The example demonstrates a reusable React component composition built with SVG primitives. The `Face` component combines separate `BackgroundCircle`, `Eyes`, and `Mouth` components, with the mouth path generated using the `d3.arc` API. D3's `range` function creates an array of 100 faces, and each instance applies randomized eye radius values for slight variation across the repetitions.