Footer is gone

Hi,

I’m a beginner at wordpress, I’m using a child theme of twenty twelve, and at first, I wanted to delete the footer, but now I would like to add 3 blocks with info (also responsive).
My problem is, is that the footer seems to have disappeared. Even after uploading the original footer of twenty twelve into my child theme, it does not reappear. (wouldn’t normally do this, it was kind of a test just to see if the footer would be there again)

The link of my page is this, the home page redirects, so this link goes to the “about” page.