ZenWurm is an animated abstract visualization featuring a flowing chain of green circles and red squares that undulate across the screen. The shapes move and resize continuously, driven by a time-based sine wave pattern that creates a mesmerizing, organic rhythm. The animation is built with D3's data join method (`join`) to update SVG elements at 60 frames per second, while a `setInterval` loop increments a time variable used in the `makeData` function to generate new positions and radii for each shape, all rendered with SVG styling.