If that bends the rules, then here's a twist.
Code:
for each $ in split('0 ,1 ,2 ,3 ,4 ,5 ,6 ,6 ,5 ,4 ,3 ,2 ,1 ,0 ',',')
 $
next
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.