You can use a simple banner system to run a promotion on your website. This module allows you to add as many banners on the different pages as you want. If you add more then one on a single page, the banners will change in the form of a carousel.
To configure banners:
1) Go to the marketing section
2) Choose banners from the list
The link parameter is optional. If you do not provide a link the banner will be static and users will not be able to click it!