This example shows a friendly yellow smiley face rendered as an SVG, with eyes and a mouth drawn using D3 shapes. The face’s eyebrows animate by moving upward and then returning to their original position over two two-second transitions. Using d3.select and d3.arc, the code builds the circle, eye, eyebrow rectangles, and mouth path, then applies chained transition() calls to shift the eyebrow group’s transform attribute. The visualization runs in a 960×500 SVG canvas with no external data, relying entirely on hardcoded dimensions.