attractmode
Python GPIO Zero Lib for reading GPIO
> sudo apt install python3-gpiozero
> sudo apt-get install python3-pip
to install python3 package manger
Python evdev lib for reading joystick controls (> pip3 install evdev )
dispAM.py (py scripts need to be edited for specific USB Encoder Joystick Controller Device Name to wait for button press on display Image)
GPIO Zero Lib is NOT preinstalled on retropie.
https://gpiozero.readthedocs.io/en/stable/installing.html
So I guess just always install it on fresh retropie image.