small register circle via & in html code example
Example: how to make a circle in html
<svg xmlns="http://www.w3.org/2000/svg">
<circle cx="50" cy="50" r="50" fill="red" />
</svg>
<svg xmlns="http://www.w3.org/2000/svg">
<circle cx="50" cy="50" r="50" fill="red" />
</svg>