This example shows a large black circle of radius 200 centered on the screen, partially revealed through a narrow vertical mask that exposes only a 10-pixel-wide slice of the circle. The visualization uses SVG elements created programmatically via the `document.createElementNS` API, with a mask containing 100 black rectangles arranged horizontally to create alternating transparent and opaque stripes. A white rectangle in the mask defines the visible window, while the circle applies the mask using `mask="url(#my-mask)"`. The result is a static, geometric pattern echoing Sol LeWitt’s minimalist wall drawings, sized to fill the full browser viewport.