Animated wavy bars fill the browser window, with each bar's height, vertical position, and opacity oscillating over time to form a flowing wave pattern. The visualization runs a continuous animation loop, updating every 60th of a second using JavaScript's `setInterval`. The D3 library's `select`, `selectAll`, and `join` methods bind data to SVG `rect` elements, while a custom `makeData` function generates the wave values using trigonometric sine functions. The bars animate across the full viewport width, with D3 7.9.0 handling all rendering and data updates.