You can add anything or make how long you want! If you want to troll ask me to copy this song and I will make you admin on your copy. The first person who wants to edit gets to admin this song! But only one rule for the admin. DON'T REMOVE SOMEONE UNLESS THEY WANT TO BE REMOVED. And one rule for all the editors. Don't interfere with someone else's work unless given permission. So that's all. Enjoy collaborating!
Also: PLease label your parts and DON'T DELETE OTHER PEOPLE'S WORK!!!!! PEOPLE HAVE SPENT TIME TO MAKE MUSIC. DON'T DELETE THAT!