intro/traditional.tex

   1 \documentclass[tikz]{standalone}
   2 \usetikzlibrary{positioning}
   3 \begin{document}
   4 \begin{tikzpicture}[node distance=1em,nodes={rectangle,draw,text=white,minimum width=10em,minimum height=2.5em}]
   5         \node (0) [fill=red]               {Presentation layer};
   6         \node (1) [fill=violet,below=of 0] {Business layer};
   7         \node (2) [fill=blue,below=of 1]   {Resource access layer};
   8
   9         \draw [<->] (0) -- (1);
  10         \draw [<->] (1) -- (2);
  11 \end{tikzpicture}
  12 \end{document}