This example reproduces Sol LeWitt’s Wall Drawing #370 using raw SVG and JavaScript. It shows a grid of thin horizontal and vertical lines, where only those inside a central circle remain visible—with alternating line directions creating a crosshatched circular pattern against a blank background. The code builds the scene by creating SVG rectangles for each line and applying two SVG masks: one with a white circle on black to reveal horizontal lines, and another with a black circle on white to reveal vertical lines. No external libraries are used; the rendering relies entirely on the Document Object Model and SVG element creation.