My first obfu! It's really simple, but I hope someone can enjoy it :) 
$a=$b=z("1,1");r(($a,$b)=($a+$b,$a))while($a<1000);z("\n");sub r{z(",$
+a");};sub z{print$_[0]};

[download]
Changed according to comments... Thank you.

In reply to Obfuscated Numbers by carthag

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