This example shows a single green circle with a blue stroke rendered inside an SVG canvas. The circle is positioned at coordinates (250, 250) with a radius of 50 pixels, displayed on a 960 by 500 pixel viewport defined by the SVG element. The code uses inline CSS properties within the SVG markup, specifically the `fill`, `stroke`, and `stroke-width` attributes, to style the shape. No JavaScript libraries or data sources are involved; the visualization relies entirely on static SVG and CSS definitions.