Here's my entry 
This doesn't match the site and seems a bit too, um, cliche.
I can change the colors to match the site, no issue
I was trying to go for a more professional look (at the risk of looking cliche). I feel that a professional looking ad/banner sets a good impression before you even visit the site. Anyways, its upto Rollin.io to decide the final one, I can always make revisions if my design gets selected.