This example shows a partially completed smiley face built with D3.js, rendered as SVG elements. A large green circle with a blue stroke forms the head, while a smaller circle represents the eye, and an arc path creates the mouth. The code uses D3 v7’s `select` and `arc` APIs to construct the mouth shape, with the SVG canvas explicitly sized at 960 by 500 pixels. The visualization is static, with no interactivity or data binding, highlighting the manual placement of geometric primitives.