This example demonstrates dynamic updates to visual elements using D3.js version 5. It shows a set of black and white circles arranged in two groups that respond to data changes over time, with a timer triggering the removal of one circle from each group. The visualization also includes a static arc path and a separate face illustration with features like eyes, nose, and mouth drawn using D3's `arc()` generator. The code specifically uses D3's selection, data join, and exit/enter operations to handle the general update pattern for removing elements when the underlying data array is filtered.