Smoke Simulator Box

I follow a tutorial about smoke bla bla bla,
But its old and ive followed 75% of the it.

Now somehow i need to see the smoke im my end render but am not,
I see a black screen… yes i know its the box.

but how to not show it?..

Cycles 2.7.1

Maybe instead of saying bla bla bla at 75% of an old tutorial you should follow 100% of a new one? https://www.youtube.com/watch?v=lYTVOdcgyP8

I just wanted to keep the story short… just like my temper lol,
ill remember for next time to mix some tutorials thanks.