\documentclass {article}


\usepackage{listings}
\usepackage{color}
\lstset{language=Perl}


\begin {document}

\begin{lstlisting}[frame=trbl]{}
#! /usr/bin/perl

use strict;
use warnings;

print "Intentionally left blank..."; 
\end{lstlisting}

or

\lstinputlisting{your_perl_file_here.pl}

\end {document}