This example by Chooo4u displays a collection of circles and ellipses arranged within a rectangular frame, all filled in steel blue. It demonstrates the basic geometric shapes available in SVG, with varying sizes and orientations including horizontal and vertical ellipses. Built with D3 v5, the code uses the `select` function to target the SVG element and appends shapes using methods like `append('circle')` and `append('ellipse')`, with attributes such as `cx`, `cy`, `rx`, and `ry` set to position and size each form.