Smiley Face Part 1
This example shows a basic smiley face constructed from a yellow circle with two red eyes and a black outline, rendered as an SVG graphic. It draws the face using React components that output SVG elements, with a D3 arc generator imported but not yet applied to create a mouth. The code positions the head and eyes using SVG circle elements with a fixed stroke width, while the face is centered on a 960 by 500 canvas. The d3.arc() function is referenced but commented out, leaving the mouth unfinished.