Fork of Smiley Face Part VI
A grid of eighteen smiley faces appears, each with randomly generated eye positions, radii, stroke widths, and mouth shapes. The example demonstrates how React components and ES6 modules structure the visualization, while d3’s `arc` API generates the mouth path and the `range` helper creates the array for the faces. All faces are rendered as SVG elements via a React component hierarchy, with styling applied directly through circle and path attributes.