How can I show multiple rotating ads in a specific zone?

Hi - I want to display mutiple rotating ads in one location (i.e. top banner) of my website. Currently, adding multiple ad images to a zone doesn't allow me to control the display of these ads and they all appear one after the other on the page.

Is there a way to add multiple ads in one area of the webstie and make them rotate (i.e. control the interface how ads will be displayed).

Thanks