http://interactivemedia.seancohen.com/fa2012/Bullen_Alex/assignment6/sliding-horizontal-parallax/index.html

http://interactivemedia.seancohen.com/fa2012/Bullen_Alex/assignment6/gradient.jpg

http://interactivemedia.seancohen.com/fa2012/Bullen_Alex/assignment6/moon/index.html