\begin{Verbatim}[commandchars=\\\{\}]
\PYG{k}{\PYGZbs{}usepackage}\PYG{n+na}{[aa=6cm,bb,cc=red]}\PYG{n+nb}{\PYGZob{}}xxx\PYG{n+nb}{\PYGZcb{}}
\end{Verbatim}