Couter attack ¤I know that it was here¤

[Hax0r]

Hello!
I'm noob in dc and i need some help.
I don't understand Counter Attack thing, i know that was in other topic but i can't understand it.
Can someone explain me step by step how it works. ?? ;]
I will by realy thankful for that.
Sorry for gramatic but i live in Poland and my english is on low level. xD