Honestly, I didn't know the right answer. I do some research in google and I found that he published his white paper in some day in 2008, and he already said that he still code for bitcoin. I also read that a legend that says "sometime in 2007" (I mean the time that he begin to write the code for Bitcoin. So, it seems that Satoshi writes the code for Bitcoin first.


For this question, I didn't find any answer until now.

Edit : I got the answer, thanks a lot bill gator.