This visualization displays event sequences as linear streams of small squares, where each sequence represents a path of GUI widget interactions from a root window to a nested element. Clicking a square highlights its entire sequence with a yellow overlay and lists the widget IDs as breadcrumb text below. The tool filters sequences by executable path via a dropdown menu. It uses D3 v5 to load JSON data, build a hierarchical tree from each sequence, and render SVG rectangles for each widget, with click handlers triggering the selection and highlighting logic.