This example animates a dynamic array of white circles and connecting lines, whose positions, radii, and line endpoints oscillate smoothly over time against a black background. Using D3.js v7 with the `select`, `range`, and data-join methods, it updates the SVG scene at 60 frames per second via `setInterval`, employing `.join()` to manage entering and exiting elements. The animation’s motion is driven by trigonometric functions, including sine and tangent, applied to the current time variable `t`.