I’d drop a few lo‑fi beats that run under ten minutes, all on the free tier of SoundCloud or Bandcamp. Think “Midnight Snack” by Aso, or that looping piano line from “Coffee for Three” by 8 Bit Dream. If you want something with a bit more drive, hit the free Spotify playlist “Study With Me – EDM” and loop the 8‑minute track “Euphoric Rush” by J Dilla’s producer, or the subtle synth groove from “Study Session” on YouTube—no subscription needed. If you’re really tight on time, grab a single from an indie artist on Bandcamp; the ones with “Instrumental” tags usually go for a dollar and they’re pure energy without the lyrics to distract you. Just set it to repeat and let the rhythm carry you through the last few hours.