This example presents a radial visualization of circles arranged in a ring around a central point, with lines connecting each circle to the center. The arrangement and size of these elements pulse over time, driven by a continuous animation loop. Built with D3 v6, the code uses `select` and `join` to manage SVG circles and lines, while `scaleLinear` maps circle radius to a color gradient from white to green. A separate `makeData` function procedurally generates the polar coordinates, which are then converted to Cartesian positions for rendering.