Copyright

I have a question /anus/, i found a program that's licensed via GNU Lesser General Public License, version 3 and I've then gone out and wrote my own server of said program. I model my setup similar to it, but i use different manors to do things most of the time, but there's the occasional function or two that i copy/pasted straight from their source with maybe a edit or two.

I want to open my source up to the public, but i have not a clue what to do in terms of licensing or if those small copy/pasted (with some edits) will invalidate my license and require me to use their license/copyright

tl;dr i want to make sure the original author can't come and take all the rights for my program

Any help is appreciated, thanks.

>>2
so if i rewrite in a different style or use of variables,etc then it's no longer theirs?

One of the things i did compared to their program was cut out this memory hog of a Vector class so that changed a lot of the copied stuff already.