\documentclass{article}

\usepackage{epic}
\usepackage{eepic}

\begin{document}

\setlength{\unitlength}{1pt}
\begin{picture}(300,200)(0,0)
  \path(100,100)(150,150)
  \dottedline{3}(50,20)(250,180)
\end{picture}

\end{document}

