MistyLook – Rotating Header Image???

I have MistyLook v2.3 on a WordPress 3.4.1 blog and would like to add a rotating header image.

Is there a cool, free plug-in that’s simple to use and implement which works well. It would be nice if I could have at least 3 or four header images and a choice of transitions.

Any suggestions would be appreciated.

Thanks in advance!