How to play all mp3 music files in a folder on Raspberry Pi

omxplayer can only play 1 mp3 files a time.
To loop through all files in a folder, I create a shell script : /usr/local/bin/playmp3.sh

#!/bin/bash

for f in *.mp3
do
  echo "Playing $f file..."
  omxplayer "$f"
done

Go to the folder has mp3 files, run playmp3.sh.

That's it.