Daily programming challenge #15 PAPER, PLEASE!

Difficulty: If you can't do it, you probably can't program at all ;')

In this challenge, we are gonna take a closer look at programming on paper. 

It sometimes help just to draw a little graphic about the code. 

Programm a programm, wich fills up an array: Draw a little sketch about the filling of the array...

Extensions:

E1: Write a whole programm on paper. YASS, YOU CAN DO IT, IT ISN'T THAT HARD! JUST DO IT!

E2: Go to some random github-page and transfer one function out of the code onto paper