nn-09_manual_net+neuralnet+foreach+scope.tex

\documentclass[border=1cm]{standalone}

\usepackage{tikz}
\usetikzlibrary{backgrounds}

\usepackage{xcolor}



\begin{document}

 \begin{tikzpicture}
  [
    every node/.style={circle, 
      fill=green,
      minimum width=15mm,
      draw,shading=axis,
      top color=green, 
      bottom color=green!50!black}
  ]

  \node (a) at (0,0){ one};
  \node (b) at (0,2) {two};
  \node (c) at (4,2) {three}; 
  \node (d) at (4,0) {four}; 
  \node (e) at (8,-2) {five}; 
  \node (f) at (8,3){six}; 

  \begin{scope}[on background layer]
    \foreach \alpha in {a,b,c,d,e,f}%
    {%
    \foreach \alphb in {a,b,c,d,e}%
    {%
    \draw (\alpha) -- (\alphb);%
    }}
  \end{scope}
\end{tikzpicture}


\end{document}