https://www.adafruit.com/category/280 https://www.adafruit.com/category/280, they're ready made from 4x4 to 16x8 but in theory you can just put more modules int

https://www.adafruit.com/category/280 https://www.adafruit.com/category/280, they're ready made from 4x4 to 16x8 but in theory you can just put more modules into an enclosure.