Latex template for schemes

gistfile1.tex

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning,arrows,shapes,shadows}

\begin{document}
  \tikzstyle{node} = [
    rectangle,
    thick,
    minimum size=1cm,
    draw=blue!50!black!50,
    top color=white,
    bottom color=blue!50!black!20,
    drop shadow,
    rounded corners=.8ex
  ]
  \tikzstyle{arrow} = [
    >=triangle 45
  ]
  \tikzstyle{header} = [
    font=\sffamily\large
  ]
  \tikzstyle{frame} = [
    thick,
    rounded corners,
    draw=black!,
    dashed
  ]
  \begin{tikzpicture}[auto,font=\sffamily]
  \end{tikzpicture}
\end{document}