Lisp needed

Hi All,
I am serching for a lisp to be able to print the oval shape when connecting 2 pipes together with different diameter, although i did find a lisp to be
able to create the pattern of the connecting pipe and it works fine.
But after a few hours searching the net for the main pipe oval shape routine the results came in empty, therefore if someone out there knows where it can be found all your help would be aprecciated.
Regards
Robert
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