I ran your program and tried it, and it is possible to turn on and off the screen to display green. In this case, I suggest you to burn the wio terminal initialization program and try again.
https://wiki.seeedstudio.com/Wio-Terminal-Firmware/
I ran your program and tried it, and it is possible to turn on and off the screen to display green. In this case, I suggest you to burn the wio terminal initialization program and try again.
https://wiki.seeedstudio.com/Wio-Terminal-Firmware/