Simley Face Part I
A yellow smiley face rendered with SVG circles and a D3 arc path, centered on a 960×500 canvas. The face uses a thick black stroke for the outline, with two eye circles offset symmetrically and an arc-shaped mouth. Built with React 17 and D3 v7, the code calculates positions from center coordinates and uses the `arc()` generator with inner and outer radii to draw the mouth. All elements are grouped with a translation transform for easy repositioning.