Thank you Hannah, for allowing me to post it here!
For an example of what this looks like, go to my photography blog [here].
1} Create your series of images--up to ten. You want them to all be the same size.
For example these are a few mine for my photography blog:
2} Upload your images to an image host. I suggest imgur. =)
3} Paste your image links into the form at this site [here]. NOTE: this site is full of pop-ups and ads. be careful.
(you could also use this tutorial for something other than your header if you want--let your imagination soar!)
If you have any questions, feel free to let me know. ;)