How to delete a charater

[LarsThePenguin]

So I wrote a keyboard driver and does anyone have a way
to like clear the screen and re-print it without that last charater
or just like use an ascii char code
heres my code (main.c):
https://github.com/penguinperson-PenguinPolar/Antartic-Operating-System/blob/main/aOS/src/impl/kernel/main.c