User blog:Zombiehunter115/How do I do that?

Ok, so yesterday I put a picture on my profile page that I uploaded from my computer, and I just now got a message on my talk page saying that I had put a non-licenced picture on the wiki. So I thought I should take it down before I get into more trouble. The message said that I could licence it somehow, but I don't know how to do that. I'm ok with me not being able to put up a picture on my page, but if anyone here could tell me how to licence it, that would be great. I'm still trying to learn here on the wiki. Please forgive me if I do anything that shouldn't be done. Thank you.