====== Latex sty ======

===== newenvironment =====

Required parameter. 

\newenvironment{declaration}[1]{everything_before}{-everything_after}

Optional parameter, only need to provide default value.

\newenvironment{declaration}[1][default]{everything_before}{-everything_after}

In latex.sty

<code>
\newenvironment{declaration}[1]{\begin{alwayssingle} \pagestyle{empty}
  \begin{center}
  \vspace*{1.5cm}
  {\Large \bfseries #1}
  \end{center}
  \vspace{0.5cm}
   \begin{quote}}
{\end{quote}\end{alwayssingle}}
</code>

Usage:

\begin{declaration}{title}

Content
\end{declaration}