I want to do upload this code

i improved a Blandes22's password-generator
but i dont first made so how do it?
i just make a new repository? or do different option?

Smart hackers, please teach me
and my English is very sucks, Becose i'm so sorry

added

1. auto copy
2. you can selected symbols, numbers and alphabets on/off
3. make a error if use over length