[Lab] Making clocks with physical media

mike Jans mjans at live.com
Wed May 22 10:35:07 EDT 2013

I recently saw a clock made from an old hard drive. I had an old laptop hard drive kicking around myself, so I built a tiny one. Its primary purpose is to be a novelty item and decorate my office, but sometimes I look at it for the time too. Unfortunately, it lacks any markings or numbers to help read the time so its only really good for getting a rough idea of the time. 
I got thinking though, when you burn a DVD, it changes colour where the information is stored. How hard would it be to burn the clock markings and times either radially or with a uniform "up" direction into the disk? Has anyone ever seen a similar project or method for burning specific shapes/patterns into a disc?
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