Variable shapes`Const`

shapes: Record<string, string> = ...

The default predefined burst shapes.

Remarks

How to add a shape:

Get the SVG shape from figma, should be ~1400 wide, ~400 high and only the white-to-transparent mask, no colors.
Run it through https://jakearchibald.github.io/svgomg/
Run that through https://github.com/tigt/mini-svg-data-uri with something like https://npm.runkit.com/mini-svg-data-uri
Wrap the output in url("")
Give it a name and paste it into the shapes object below.