This example uses D3 to render an animated SVG scatterplot of circles. The code generates synthetic data, calculating each circle’s x, y, and radius from a sine wave function based on an index and time variable. At 60 frames per second, a `setInterval` updates this time value, and the `d3.select` and `d3.range` APIs update existing circle attributes via the `.join` method, creating a smooth, pulsing wave pattern. All rendering is handled as SVG within the full browser viewport.