Some fun I was having with an Adafruit 64x32 RGBLED Matrix on an Arduino Mega 2560
You will need this library from Adafruit as well:
https://github.com/adafruit/RGB-matrix-Panel.git
Be careful of the orientation of the cable when wiring. If it doesn't work, flip the ribbon cable over and try the same wiring scheme on the opposite orientation (happened to me twice)
Part list:
https://www.adafruit.com/product/3826 (or similar, mine is non-flexible 4mm or 3mm)
https://www.amazon.com/ARDUINO-MEGA-2560-REV3-A000067
https://www.amazon.com/Universal-Suitable-Security-Converter-110V-240V/dp/B091BGS653