First: Thanks @AlberticoD, I will try your solutuion, I find it very accurate. 
Second: Something to report is when you are writing a post, in the preview, you cannot see the code format right, it shows like raw text. This happended to me because I dindn´t check the final format of the code in the real post and I thought that was a bug, but when I came back I saw that I was ok. So, would be great if we can see it formatted in the preview. But I think that this is for other thread.
Thank you guys! 