How do I add value to time elapsed ?

Hello, it's again me with my clicker game (like cookie clicker...)

(Sorry for my english, tell me if i'm not clear)

Let's go. I want to create Message (Text) and want it to be written something like :

You win (PerSecondValue * Time elasped) Coins while you are away.

Maybe helpful :

http://hpics.li/84e0529

Maybe helpful :

rex_time_awayL

Sample+. capx

I think u're files will help me, need some change and perfect

I'll contact you if isn't working, but thx men !