A wave-like pattern of 15 circles oscillates across the screen, moving vertically in a sine wave that shifts over time. The visualization uses D3's `select` and `range` functions to generate the data, and the `join` method to bind it to SVG circle elements. Each frame updates the `cx` and `cy` attributes based on the current time value `t`, which increments by 0.01. The animation runs continuously via `setInterval` at 60 frames per second, rendering in an SVG canvas sized to the browser window.