This visualization presents a compact overview of event sequences from Windows application activity, where each row represents a single process event chain and each column indicates a UI element change over time. The event data, sourced from `data.json`, includes timestamps, application names like Word and PowerPoint, and window or pane class names. Built with D3 v5, the SVG rendering uses a color scale based on the distribution of pane class names across the dataset to encode recurring patterns. Rows are displayed as sequences of colored rectangles, and hovering over a row highlights that specific event sequence. The code utilizes D3’s `hierarchy` function to structure each event’s nested children and `scaleSequential` with an `interpolateRdBu` color gradient for visual encoding.