Learning how to code!

Hello! I am interested in learning how to code and I decided I wanted to do a little personal project that a friend recommended I try. I want to make a code that when executed will write letters, in a fashion like this:

LLL
LLL
LLL
LLL
LLL
LLL
LLL
LLL
LLL
LLLLLLLLLLLLLLLLLL
LLLLLLLLLLLLLLLLLL

Hope someone would be willing to teach me!

Thanks.