Need help in making app

MIT App Inventor Help
1

Actually i wanna make an app which when starts it start a sound mean audio and make the volume full and even if app is back audio should not stop
the only way is to uninstall app or restart Device

The purpose to make this app is only to prank my friends

2

You could use this extension to keep playing sounds even when the app is closed.

But it might look like a virus or something dangerous and act like a malicious app.

3

I don't have any intention to do something like this as i mentioned earlier in post