This example shows a simple, hand-coded smiley face progressing toward completion: a yellow circle head with a black outline and two black eyes, rendered as SVG shapes. The code uses React to define the `App` component and `ReactDOM.render` to mount it into the DOM. It calculates the face geometry from fixed constants for center coordinates, eye offset, and radius, then draws three `circle` elements with inline attributes like `cx`, `cy`, `r`, `fill`, and `stroke-width`. The face lacks a mouth, indicating it is only partway finished.