\documentclass{article}
\usepackage{a4,german}
\setlength{\unitlength}{0.1in}
\begin{document}
\noindent
\begin{picture}(65,90)
   \thinlines
   \multiput(0,0)(1,0){66}{\line(0,1){90}}
   \multiput(0,0)(0,1){91}{\line(1,0){65}}
   \thicklines
   \multiput(0,0)(5,0){14}{\line(0,1){90}}
   \multiput(0,0)(0,5){19}{\line(1,0){65}}
\end{picture}
\end{document}

