Good to put music on your background. You can also import sounds. See below two great sites to get free music and sounds for your Scratch Projects. Black Vortex Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/
https://incompetech.com/music/royalty-free/index.html?feels%5B%5D=Action&feels%5B%5D=Aggressive&Search=Search+by+Feel https://soundbible.com/
