I hav sum coding questionz... -.-

I'd like to know how to make my username blink, how to make the background of my search bar be a GIF, how to make the Spacehey URL box be rounded, how to remove the white border around my friends comments box, and how to change the titles of my headers without the old title being there.

I deleted a lot of things off of here because, thanks to the person who commented below, I was able to fix a lot of my problems!