\begin{verbatim}
sub mysub {
my @args = @_;
return \@args;
}
\end{verbatim}
This is a default
display block
\begin{center}
Some centered text
\end{center}
Some text that is outside blocks
And now in a block.
And now no more in a block.
The footer.
things and
\begin{center}
more centered things
\end{center}
\begin{center}
more centered things
\end{center}
Text.