Script For adding specific number of friends to a group

Hey guys ,
I'm a newbie here ..
Started to do some facebook marketing and i wondered
if any of you are familliar with a script that adds specific number of friends each time ?
i don't want to add all at once cuz after like 600 fb blocks you.
Thanks , Kevin

Search for TechByte in google, he's making a very good Facebook bots

Minimum number of members if you will add in the group using bot, you won't get banned. But if you will add more and continue doing that then you will get banned. Better add manually.