Allrighty, here are my problems:
1: I know nothing of coding, even less of Excel manipulation or w/e. I tried to follow the guide, but I'm stuck at somewhere in step 5 I guess? anyway
2. Either I'm working at school, which have some weird gimmick concerning saving files, and that 5th step lead me in a maze cause of that, or
3. I'm working at home with Excel online, which even the 2nd step (Alt+F11) doesn't do anything.

There. I've hit a roadblock.
And btw thanks alot for your help guys, but coding is bloating me. I mean, I don't mind learning, but by that point, I'm pretty sure filling my squares one by one would be faster y'know