This example demonstrates a simple animated face constructed from basic SVG shapes, including circles for eyes and a path for a mouth. Using the React framework with D3 v4, the visualization initially draws a purple background, a yellow circle, and facial features. The left and right eyebrows are rectangles that animate vertically twice using D3’s `transition` with a duration of 2000 milliseconds each, creating a blinking or expressive motion. The mouth is generated using the `d3.arc` function to define its path, while shape positions are calculated from the SVG’s width and height attributes.