Smiley Face Part II
This visualization displays a large yellow smiley face, drawn with a green circular head and black-outlined eyes, positioned at the center of the browser window. The face scales to fill the viewport, with the head's radius based on the window height. Built using React and D3.js (v5), the SVG elements are constructed via the `ReactDOM.render` method, using D3’s `arc` import and hardcoded constants for eye and mouth dimensions. The example adapts to the full screen size, but leaves the mouth incomplete, showing only the head and eyes.