This example demonstrates fundamental DOM manipulation with D3.js by constructing a yellow smiley face from SVG shapes, then animating its eyebrows and mouth. The code uses d3-selection to append and configure circles, rectangles, and an arc-based path for the face components. A chained `transition().duration(2000)` moves the eyebrow group vertically and shifts the mouth, creating a subtle facial expression change. The visualization runs entirely in the browser using D3 v5 and renders via SVG, with all geometry defined through static attributes rather than data binding.