This gallery example renders a grid of procedurally generated smiley faces using React and SVG. The D3.js library provides the `arc` generator to draw each face's mouth, while random values control facial features like eye offset, eye radius, mouth width, and stroke thickness. The `range` function from D3 generates the array of faces, and a FaceContainer sets the SVG canvas and translates each face to its center position for a clean, repeatable composition.