A large circle is drawn on a full-screen SVG canvas, with a horizontal line bisecting its lower portion and a vertical line crossing the entire viewport, forming a cross-like composition. The visualization uses D3 v5 selections to append SVG elements, dynamically sizing the canvas based on the browser’s client dimensions. The circle and lines are styled via CSS, with the circle having a white fill and black stroke, while the lines use a black stroke and fixed 4-pixel width.