I Have A Question About Keyboard Coding

About two weeks ago, I saw a custom keyboard project by chance.
After seeing project, I decided to make my own keyboards.
So, I made hardware. But I have a difficulty of programming. It doesn't work when I coded.
I used arduino pro micro.(horizontal pins: A0, A1, A2, A3, vertical pins: 2,3,4,5,6,7,8,9,10,14,15,16)
I post pictures about my plan. If anyone knows, Please teach me how to program.
Thanks :slight_smile:
https://blog.naver.com/enlimu36/221332285992

U-Lim:
Please teach me how to program.

You must be a troll, right?