This example shows a smiling face built from SVG shapes, including a yellow circle, rectangular brows and nose, white eyes, and an arc-based mouth. The right brow animates downward in two sequential transitions, creating a winking effect. The code uses D3 v5 selections to append and style elements, helper functions like `d3.arc` for the mouth path, and chained `transition()` calls for the animation. All graphics are rendered in a static SVG canvas with no external data.