NPCs to Kill mob quest

[uriielfl 0]

Hi, There! How are you? So, basically i have this questions about. How to create an NPC with quest?

I already know the basically about how to create a NPC, like MES, switch structure, chose the sprite, localization, etc. I wanted to know how to insert a question on it. 

For exemple: 

You talk to NPC to kill 10 porings and win a hat when it's done. 

Thanks in advance and sorry if I did something wrong on this post. 

[LucianoCP 2]

open script_commands.txt in doc folder and search for "setquest", "checkquest" and "erasequest". Search for these things on rathena github too. You can learn by reading original scripts too.