This example demonstrates the general update pattern for animated data changes in D3.js. It shows a row of fruits—apples and lemons—that are added, removed, or replaced over time, with the visualization updating accordingly. A set of timed transitions modifies the underlying array, and the code uses `selection.selectAll('g').data()` to manage enter, update, and exit states for each fruit group. The visual properties, such as circle radius and fill color, are mapped via `scaleOrdinal` from the D3 API, and the updates are triggered by `setTimeout` calls in a simple script. The rendering is done as SVG elements within an HTML page.