This example reproduces a Sol LeWitt-style drawing using raw SVG elements created via the `document.createElementNS` API. It shows a grid of thin horizontal and vertical rectangles that are revealed only within two circular regions at the center of the screen, achieved through SVG masks. The first mask uses a white circle on a black background to show the horizontal bars, while the second mask inverts the colors to display the vertical bars. The layout adapts to the window size, and the 100 bars in each direction are generated procedurally with no external data source.