Perl routine to add a text footer to pdf documents

I Need a Perl routine which will open an existing pdf document, and add a 2 line footer in grey text at the bottom of every page. 1) The routine should use PDF::API2 2) The subroutine should be called like this: add_pdf_footer ($path_to_document,$line1,$line2); For test purposes, the Footer should be identical to the centered Footer at the bottom of the page as shown in the attached pdf file. ... See footer at the bottom of attached PDF file testdoc-footer.pdf...