This visualization reproduces a Sol LeWitt art piece using a grid of horizontal and vertical rectangles, each masked by repeating SVG symbols. The piece shows an interplay between geometric lines and symbolic shapes, where the masks reveal or hide portions of the grid based on symbol placement. Built with D3 v6, the code uses `select`, `range`, `symbol`, and `symbols` APIs to generate the SVG elements and masks. Two masks are rendered, one inverted, to create contrasting visual effects across the 100-line grid that fills the browser viewport.