I learned this a while ago, because I have some experience with coding and scripting, I learned quickly.
It's kind of like this, but I won't use actual codes.
If you had a dog... pretend it's code is called "Dog", and a rat, pretend it's code is called, "Rat", and they are not side by side! You want them to be, though.
So, probably right now, Rat (code) and Dog (code) are probably looking like this ---
Rat
Dog
or with spaces in between the two lines.
You want them to look side by side, so you would put them like this. Side by side.
RatDog
If those were real codes, it would show up as two pets side-by-side!

I hope I kind of helped :O It is a little hard to learn at first, but you'll get it!