For this, I made a Spotify playlist with 41 hours of instrumental soundtrack music that helps me focus. It's not random like yours, but with that many hours, there's enough variation if you put it on shuffle.

It's mostly epic and uplifting movie scores. Or suspenseful and building up to something... none of that 8-bit video game beep boop shrill stuff.

https://open.spotify.com/playlist/31buZEaVGW9f5Y4cEcKtbt?si=...