https://app.auxy.co/projects/SgojacFExa23qWuc6ucyRw==
Admittedly this is kind of advanced but I was practicing my counterpoint and made a 4 part harmony, I figured I’d post and make a challenge out of it
Only 2 is necessary if you don’t have a lot of practice doing this but the more the better (just don’t make brown by mixing too many colors 
)
Assuming you know what harmony is, a counterpoint is essentially two or more different melodies played simultaneously that go together to create harmony- think Bach
Or download the file at the top and use that example