The visualization animates the quicksort algorithm on 200 shuffled values, rendering each value as a rotated vertical line whose angle reflects its magnitude. A red line marks the active pivot, while black lines indicate the current partition and gray lines show inactive regions. Using D3.js v3 and SVG, the animation replays recorded swap and partition actions in reverse order, updating line positions and classes via `d3.transition`. The code generates the action log by recursively partitioning the array, then drives the playback through chained transition callbacks.