LED display is the result of my own creation although the idea was inspired by the making of these articles electronically that I read on the internet. see the development of the current era, I would argue that while this is a golden era of LED.
The first "prototype" i made (i call first generation)

Main PCB, i call "master brain" to make led alphabet moving/running.
this is look like

Doing with my PCB display

This is "Master brain" look like