This example demonstrates a simple animated visualization of circles connected by a line path, with positions and radii oscillating over time. Built as a modular JavaScript application using ES6 imports, it initializes an SVG canvas with D3 v7 and uses `setInterval` to update the scene at roughly 60 frames per second. The animation relies on custom functions `makeData` and `vizData` to generate data points and render circles and a line using D3’s `line` generator, with `selectAll`, `data`, and `join` for smooth updates.