This visualization reproduces a Sol LeWitt art piece using D3 to generate a grid of horizontal and vertical black lines layered over the full viewport. The lines are clipped by two circular masks centered on the screen, creating a crosshatched pattern that fades into blank space beyond the circle boundaries. The code uses D3 selections and the `join` pattern to append SVG `rect` elements, with `mask` elements defining the visible regions via white and black circles. The artwork is rendered entirely in SVG using D3 v7.