export DISPLAY=':0'
---------Disable screen dark
If you want to disable the blank screen at every startup, just update the /etc/lightdm/lightdm.conf file and add in the [SeatDefaults] section the following command:
[SeatDefaults] xserver-command=X -s 0 -dpms
---------Hide display bar
Edit the file /etc/xdg/lxsession/LXDE-pi/autostart
comment out the line @lxpanel --profile LXDE-pi with # symbol
https://img.cloudygif.com/full/fd19a6fd81a7cd0d.gif //Pirates Carabean GIF