You're looking for the sheet music or score for "Cavetown" by Cavetown, specifically for the song "Cappadocia".
The Score:
There is a viral, high-quality PDF of “Cavetown - Pigeon” floating on piano forums. The descending bassline feels like looking down from 500 feet in a balloon basket. cavetown cappadocia score pdf top download
Search: Use the internal search bar on MuseScore or Musicnotes for "Cavetown Cappadocia". You're looking for the sheet music or score