You need to download the LG flash tool and an appropriate kdz file as to what version you would like to revert to, KitKat of course but there are a few versions I would recommend the v10L as it is the most polished one. Google this and you will find all the needed information to reverting back to stock. Good luck!
Haha no just wishing you good luck Don't worry it is not a hard process just follow the instructions from the xda developers site and you won't have any problems.