Two functions on one button in Gpio buttons

[Nutul]

Why not have a script that checks the status of the mpd_oled service ?

Change the echo to start/stop as appropriate.

Please forgive me, I don't understand programming in the Linux environment at all
Could you please tell me how to do it, or point me in the right direction. 

Thanks

Code:

#!/bin/bash

if (systemctl is-active --quiet mpd_oled); then
   sudo systemctl stop mpd_oled
else
   sudo systemctl start mpd_oled
fi

1. copy the contents in the code-block above into /home/<your username>/bin/mpd_oled_toggle.sh
2. make such file executable: chmod 0777 /home/<your username>/bin/mpd_oled_toggle.sh
3. in the command of the button (just one button, now), specify the whole path as it appears here above, instead of each of the sudo systemctl start/stop ...