Xbox 360 help please sirs

So a long time ago when i got my Xbox 360 i put a picture of the Xbox sign and used it as a backround for it, but now i don't like it and i want to take it off but i have no idea how. Can someone tell me how to delete or take it off or whatever : \

Sorry i wasn't very descriptive, i put a picture threw USB drive onto my Xbox 360 and i don't know how to get it off. i want to delete it off the Xbox.

Alright cool thanks. i'll look.

I followed, what you said and when you go to System Setting, then Console settings there is no theme thing anywhere. All i want to do is delete/remove an old xbox picture i put on my xbox and used as a backround. I want to take it off the xbox. Delete the picture off the xbox.

Like i used the picture as a theme years ago and now i don't want it on my hard drive anymore i want to get rid of it.

I figured it out. Nevermind.