This pseudo-visualization uses horizontal bars to show the duration of spacewalks, with their lengths proportional to the data values. Overlaid circles use categorical colors to distinguish different spacewalkers, each positioned at a corresponding vertical index. The visualization employs the d3 selection API to build the SVG scene, combining a `length` module that renders rectangles with a `hue` module that draws colored circles. The data is a simple array of five values, and the design imitates a rough sketch of spacewalk tracks.