Note on music autoplay:
On some browsers, audio will not play automatically, but only in response to user interaction.
So the code gives the user play and pause buttons.
See notes on audio autoplay on web browsers
and in particular on Chrome.
Use your own music
Get a downloadable file of some music you like.
One site with free music is
There are many others.
When you find music you like, download the music file to your computer.