Play/pause audio without using soundcloud

Is there someone that could help me to figure out how to make a widget play/pause a short audio clip i have?

have a look here for the basic setup:

Sorry, I am very unfamiliar with code. I am trying to link to an mp3 from Dropbox and it doesn’t seem to work.

Try editing the tail of the dropbox URL from dl=0 to dl=1.

Amazing, that worked. Thank you.

Is it possible to have the play/pause button customized to a picture?