This example shows a simple, static sad smiley face rendered as a yellow circle with black eyes and a downward-curving arc for a mouth, all drawn in SVG. The face is centered in a 960×500 viewport, with the eyes and mouth positioned using translate transforms. Built with D3 v5, the code uses `d3.select` to target the SVG and `d3.arc` to generate the mouth path, while circle elements are appended directly for the head and eyes. No animation or interaction occurs; the visual is purely geometric.