There are certain ways to read music notes. Music notes can be thrown together out of joy or rage or depression. But, in a lot of ways music is a way for the creator to express themself. Music is just one big form of expression for people. Some people listen to music when they are happy, other people write music when they are happy. Writing music when your happy would be a lot harder because ou have to hold onto that feeling for moths while the song or beat is being written.