This visualization recreates a Sol LeWitt wall drawing using two overlapping SVG masks to generate a grid of horizontal and vertical lines that intersect in a triangular pattern. A white triangular mask on a black background controls the horizontal lines, while an inverted mask controls the vertical lines, creating a clean boundary between the two orientations. The code builds the SVG dynamically with vanilla JavaScript, creating 100 rectangle elements for each direction and applying the masks via the `mask` attribute. The result is a geometric, generative art piece that mimics LeWitt’s instructional drawing style.