This example renders a simple smiley face using D3.js v5 with SVG. It draws a yellow circle for the head, two black circles for eyes, and an arc path for the mouth, all positioned within an SVG container. The code uses d3.select and d3.arc with inner and outer radius settings to construct the mouth shape, demonstrating basic SVG append operations and attribute assignment. The visualization is purely static, with no data binding or interactions, serving as a minimal HTML starter template.