Hello HTML
This example displays a single dark circle centered on a blank SVG canvas, with a body styled to have no margin and hidden overflow. The code uses raw HTML, CSS, and JavaScript, embedding an SVG element with a hardcoded circle radius of 200. The SVG’s width is set to 960, while the circle’s x-coordinate is written as the string “960/2” rather than a numeric value, so the circle renders at the default x-position of 0. No external libraries are used; the visualization relies purely on standard browser rendering of SVG and CSS.