This background used https://github.com/rocksdanister/audio-visualizer-wallpaper as a base.
Lively Wallpaper can be found both on the Microsoft Store and open source on Github (https://github.com/rocksdanister/lively/).
Just drag the folder holding the index.html into your Lively wallpapers forlder (...\Lively Wallpaper\Library\wallpapers). It should appear in your wallpaper library thereafter.
The iframe version, that can be used on a website, can be found at https://github.com/101010101010101011010/FCLogoWeb.