press the green flag to start the song :) It might take a couple tries to have the correct sound length, because the music mod lags a little on the first try lol -anyway, enjoy! :D
I used the Music mod for this. I made the instrument Wooden flute because is sounds like a human (or mouse) whistle a little bit. I recomend the Music mod if you are going to make any music in your games. Have fun! :D