This example demonstrates animated sine waves rendered as a dynamic set of SVG circles whose positions and radii update continuously with time. The visualization uses `d3.selectAll`, `.data()`, and `.join()` to bind and update circle elements, while a `setInterval` loop calls `makeData()` to generate new coordinates and sizes. The code relies on D3 v6 APIs including `d3.line` and `d3.range`, with `vizData()` applying attribute updates for `cx`, `cy`, and `r`. The animation runs at 60 frames per second, creating a fluid, undulating pattern.