Graphic Design

this is a graphic design job to improve enhance the appearance of my e-commerce websites home page. There is a banner that has to be done in a specific size to fit with text for which I would like a few options so that they can changed from time to time, including some seasonal / festive options ...xmas, autumn , spring , summer, etc...
The website is www.commerciallinen.co.uk if you see the current banner is a woman sleeping which fades colour ....I could do with some options also promoting products and offers, in total 12 good options to start would be ideal then I can change the banner monthly and see how it goes. This should be an easy job and should not take much time.