For Halloween this year I am going as Dr. Stranger Things.
I found a version of one built using the Neopixels Library, I edited it for FastLED Added numbers and a space location. To edit it you just need to setup where each number/letter is on your LED strip. Just connect your BLE or Bluetooth chip to the arduino and connect to it through a bluetooth serial app, and send your message you want displayed.
Here is a demo version without the numbers on the cardboard, but they do work.
I will post with a more finalized version in the future but the code works fine and is easy to read and understand.
