What is the alien glyph?

A visitor to a science fiction convention spotted some odd markings on a sidewalk in Denver Colorado. A website address was included and thus the mystery deepened. The site has keywords in its meta tags for War Of The Worlds and other enterprising detectives found the site is registered to Paramount. A viral marketing campaign in the making perhaps? Is there a secret message in the symbols? Check it out here (and try refreshing the page to see the colours change). And the sidewalk image can be seen here.