Can't somebody help me ? (URGENT)

I've a school project. I've to create a website and I had decided to make a Harry Potter website. the problem is, I want to use a header/whatever-you-want-to-call-it (you know, the one that looks like a banner) but I've no idea how to make one.

can somebody make a Harry Potter header for me ? I'll credit you and give you props, just please, help me :(

PS : my website's called The Chronicles of Harry Potter :p