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...OK, so I admit it. I just spent my entire afternoon writing a Haskell
program that generates a pair of PostScript files that, when printed
out, appear to contain blocks of randomly-aligned lines, but when
superimposed on each other will reveal a hidden image.
Irritatingly, 80 GSM paper isn't actually very transparent, so this
doesn't work at all... :-(
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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