This gallery example renders a customizable smiley face out of layered SVG shapes, including a yellow circular background, offset eyes, and an arc-shaped mouth. The face is built through React components that accept size and position parameters, while the mouth uses a D3 arc generator to define its geometry. Although the files define the face-drawing logic, the active visualization instead fetches a CSV of CSS named colors from a GitHub gist and displays a summary of its row, column, and kilobyte counts, mixing React state with D3’s CSV parsing and formatting utilities.