background color changes while scrolling

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0

I was randomly browsing the net when I chanced upon this site:

http://ift.tt/1qS5v06

I was intrigued by how the background color changes while scrolling down the page. As a newbie web developer I want to inquire if you guys know how it was programmed, did they used JavaScript, flash and PHP? Do you guys have any sample code for this? 

asked 1 min ago

user3547597

1