Simple banner design for internet marketing website

I require 3 banners in the following sizes: 1 banner @ 728 x 90 1 banner @ 468 x 60 1 banner@ 250 x 250 the banners will be used to promote our internet marketing company. All the banners will be the same design just different sizes so it will be a simple job for an experienced designer. I only require a simple design, however it must look professional. I will provide text and instructions to winning bidder. Banners cn be in any of the following formats: jpg, gif, png banners are required asap and full payment will be sent once banners are approved. banners are to be sent through freelancer mail as a zip file only as is all email correspondance. Thanks.