This example builds a simple smiley face using React and SVG, rendering a yellow circle with two black eyes. The face is drawn with three `<circle>` elements, where the head and eye positions are calculated from fixed width, height, and offset variables. The code uses ReactDOM to mount the component, and computes the head radius from the height minus a stroke width. It demonstrates basic SVG styling with fill, stroke, and positioning in a 960x500 viewport.