title: How can I change playback music between game
body: <p>I'm trying to write a code to change playback music between the game. main playback music is correct and work, but I don't know how to change it between the game.
  I'm trying to stop it and set new playback, but it does't work.
  I use this code for the main playback:</p>
  
  <pre><code>pygame.mixer.music.load('music.mp3')
  pygame.mixer.music.play()
  </code></pre>