Super simple actionscript

Banner functionality needed ( Only functionality ) The design is complete, all the files are ready, all that is needed is to add the action script: Brief: The banner is rather simple, there are 3 squares in the middle, these squares have images inside, what I want is a randomizer of the 9 images inside on the click of a button ( something like a **slot machine** ) Again, these images would change everytime a user clicks on the button below the randomizer ( 3 square ) It would also need to automatically randomize every 5 seconds ( as if someone was clicking the button every 5 seconds ) The only difference from this and a slot machine is that the images cannot duplicate, it has to be a different image in each square. That's pretty much it, as I said, all the design and positioning has been done, all I need is the functionality.