
\documentclass{article}
\usepackage{com.braju.pstricks}



\pagestyle{empty}

\begin{document}



\LARGE
\psset{unit=10mm,arrowscale=1.5,linewidth=1.5pt}
\begin{pspicture}(0,0)(10,10)%\showgrid
  \SpecialCoor
   
   
   
   \rput[tr](1,7){\circlenode[linecolor = white]{x1}{$X_{1\ }$}}
   \rput[tr](3,7){\circlenode[linecolor = white]{x2}{$X_{2\ }$}}
   \rput[tr](5,7){\circlenode[linecolor = blue]{x3}{$X_{3\ }$}}
   \rput[tr](7,7){\circlenode[linecolor = white]{x4}{$X_{4\ }$}}
   \rput[tr](9,7){\circlenode[linecolor = white]{x5}{$X_{5\ }$}}
   
   \rput[tr](1,5){\circlenode[linecolor = white]{x6}{$X_{6\ }$}}
   \rput[tr](3,5){\circlenode[linecolor = blue]{x7}{$X_{7\ }$}}
   \rput[tr](5,5){\circlenode[linecolor = red, linestyle = dotted]{x8}{$X_{8\ }$}}
%   \rput[tr](5,5){\circlenode[linecolor = red]{x8}{$X_{8\ }$}}
   \rput[tr](7,5){\circlenode[linecolor = blue]{x9}{$X_{9\ }$}}
   \rput[tr](9,5){\circlenode[linecolor = white]{x10}{$X_{10}$}}     
   
   \rput[tr](1,3){\circlenode[linecolor = white]{x11}{$X_{11}$}}
   \rput[tr](3,3){\circlenode[linecolor = white]{x12}{$X_{12}$}}
   \rput[tr](5,3){\circlenode[linecolor = blue]{x13}{$X_{13}$}}
   \rput[tr](7,3){\circlenode[linecolor = white]{x14}{$X_{14}$}}
   \rput[tr](9,3){\circlenode[linecolor = white]{x15}{$X_{15}$}}                
   
   \rput[tr](1,1){\circlenode[linecolor = white]{x16}{$X_{16}$}}
   \rput[tr](3,1){\circlenode[linecolor = white]{x17}{$X_{17}$}}
   \rput[tr](5,1){\circlenode[linecolor = white]{x18}{$X_{18}$}}
   \rput[tr](7,1){\circlenode[linecolor = white]{x19}{$X_{19}$}}
   \rput[tr](9,1){\circlenode[linecolor = white]{x20}{$X_{20}$}}
   
   \ncline{-}{x1}{x2}
   \ncline{-}{x2}{x3}   
   \ncline{-}{x3}{x4}
   \ncline{-}{x4}{x5}
   \ncline{-}{x6}{x7}
   \ncline{-}{x7}{x8}
   \ncline{-}{x8}{x9}
   \ncline{-}{x9}{x10}
   \ncline{-}{x11}{x12}
   \ncline{-}{x12}{x13}
   \ncline{-}{x13}{x14}
   \ncline{-}{x14}{x15}
   \ncline{-}{x16}{x17}                           
   \ncline{-}{x17}{x18}
   \ncline{-}{x18}{x19}
   \ncline{-}{x19}{x20}
   
   \ncline{-}{x1}{x6}
   \ncline{-}{x6}{x11}
   \ncline{-}{x11}{x16}
   \ncline{-}{x2}{x7}
   \ncline{-}{x7}{x12}
   \ncline{-}{x12}{x17}
   \ncline{-}{x3}{x8}
   \ncline{-}{x8}{x13}
   \ncline{-}{x13}{x18}
   \ncline{-}{x4}{x9}
   \ncline{-}{x9}{x14}
   \ncline{-}{x14}{x19}            
   \ncline{-}{x5}{x10}
   \ncline{-}{x10}{x15}
   \ncline{-}{x15}{x20}               
                           
      
\end{pspicture}

\end{document}
