How to make a changing banner type thing on a website?

I see this a lot on websites nowadays, don't know exactly what it is called, but the best example I can think of is the home screen of the itunes store. It's like there is a big picture with 3 smaller pictures on the side and the pictures rotate taking turns as being the large picture. Is there a free website builder or blog builder that allows to implement something like this?How to make a changing banner type thing on a website?What you should search for is a javascript carousel and I didn't find exactly what you described, but close. You just need to spend some time now that you know what to search for