This example shows two circles positioned on an SVG canvas: a large green circle centered at 480,250 and a smaller red circle offset to its upper left. The code uses plain SVG elements (`circle`) rendered directly in an inline `<svg>` tag with fixed `width` and `height` attributes. No JavaScript libraries are involved; the styling relies solely on CSS to remove page margins and hide overflow, while each circle’s size and color are set via `r`, `cx`, `cy`, and `fill` attributes.