Hello HTML
This example shows the simplest possible data visualization: a single yellow circle with a black outline centered on a 960 by 500 pixel SVG canvas. The page uses raw HTML and SVG, with no external libraries, to demonstrate that a visualization can be built with just a few lines of markup. The circle’s position and size are set via explicit `cx`, `cy`, `r`, `fill`, `stroke`, and `stroke-width` attributes, while the global CSS hides scrollbars by removing the default body margin. The underlying source is purely static, with no data file or scripting involved.