Answer:
Use Audacity portable and download the song onto your computer. Once you do that open it onto Audacity Portable. cut out how much you want. After that, go to effects at the top of the screen and go through the list, and once you find fade out, choose how much you want to fade out and highlight that portion. after that go back to effects and click Fade Out. Play the song once more just to make sure you got it right