Prolet on "How to display footer in Twenty Twelve child theme"

Hi alchymyth and thank you for your quick respond!
I don't know absolutely anything :( I took this project few days ago and I'm trying to finish it.
The child theme is built by somebody else and I'm not very confident with my coding knowledge...
I just want to have a normal footer to display widgets and some links.
Can you give me some directions, please?
Thank you for your time!
...................
aaaaaaaa, now I understand :)
I have to put the content between <?php/* and the closing tag :)
I should read before to write...
THANK YOUUUUUU!