This example generates a minimalist geometric composition inspired by Sol LeWitt, using raw JavaScript and the SVG DOM API. It creates a grid of vertical and horizontal bars by appending `rect` elements to an SVG canvas that fills the entire browser window. The vertical bars are positioned on the left half, while horizontal bars extend from the center to the right, with spacing based on a fixed bar width and the window dimensions. No external libraries are used; the code relies on `document.createElementNS` and manual attribute setting.