[How to do instruction] 128x64 OLED with Song Status and Spectrum Display on Raspberry Pi

[Jempie]

Try to:
shutdown
switch off and (after a while(10 sec.)) switch on:
now the OLED is blank?
try to start play music:
are you listening music?

I have to start over again, i cannot get it on, no connection with the internet because
i give this command

sudo systemctl disable mpd_oled.service

sudo reboot