\unitlength = 1mm
\begin{picture}(50,100)(0,0)
\put(0,0){\tiny \grid(50,50)(5,5)[0,0]}
\put(25,25){\circle{50}}
\drawline(15,0)(20,5)(30,10)(50,35)
\drawline[-50](10,5)(15,10)(25,15)(45,40)
\thicklines
\dottedline{1.4}(5,10)(10,15)(15,25)(40,45)
\dashline{2}(0,15)(5,20)(10,30)(35,50)
\thinlines
\begin{drawjoin}
\jputfile{epicdata}{\picsquare}
\end{drawjoin}
\end{picture}