This is a project written in Alda, a music programming language. I'm translating the first movement of Haydn's Sonata No. 60 in C Major into code.
You'll need the latest release of Alda, which you can install by following the instructions here.
Once Alda is installed, start Alda in the background by running:
alda up
Navigate to the directory where the code is located and type the following:
alda play --file haydn.alda
Visit here for an official guide to Alda.