bild.tex

\documentclass[dvipsnames,crop=true]{standalone}
\usepackage{tikz,pgfplots}
\usetikzlibrary{calc,external,intersections,pgfplots.colormaps}
\begin{document}

  \tikzsetnextfilename{seeding}

  \begin{tikzpicture}[scale=0.7,line width=1pt]

    \begin{scope}[/pgfplots/colormap/viridis,
          cmap/.style={/utils/exec={
                  \pgfplotscolormapdefinemappedcolor{#1}},
              fill=mapped color}]

      \foreach \r [count=\i] in {1, 2, 3, 4} {
        \draw[name path global/.expanded=r\i] (0,0) circle(\r);
      }

      \pgfmathsetseed{1042}
      \def\n{6}
      \foreach \i in {1,...,\n} {
        \pgfmathsetmacro{\a}{360/\n * \i}
        \pgfmathsetmacro{\b}{rand*30}
        \pgfmathsetmacro{\bo}{\b}

        \pgfmathsetmacro{\bi}{180-\b}
        \begin{scope}[rotate=\a]
          \draw[->,name path global/.expanded=t\i,dashed] (0,0) to[out={\bo},in={\bi}] (5,0);
        \end{scope}

        \pgfmathsetmacro{\bmid}{\b/2}
        \pgfmathsetmacro{\col}{int(1000/\n * \i + 100)}

        \foreach \r in {1, 2, 3, 4} {
          \path[name intersections={of={t\i} and {r\r},by={h\r}}];
          \fill[cmap=\col] (h\r) circle(4pt);
          % \fill[LimeGreen] (h\r) circle(2pt);
        }

        \pgfmathsetmacro{\hof}{int(rand+1)}
        \pgfmathsetmacro{\hi}{int(1+\hof)}
        \pgfmathsetmacro{\hm}{int(2+\hof)}
        \pgfmathsetmacro{\ho}{int(3+\hof)}

        \coordinate (sd) at ($(h\ho) - (h\hi)$);
        \path let \p1=(sd), \n1={atan2(\y1, \x1)}, \n2={\y1*5cm} in node[Orange,rounded corners,draw,rotate=\n1,inner sep=0,minimum height=3mm,minimum width=2.1cm,rectangle] at (h\hm) {};

      }

    \end{scope}

  \end{tikzpicture}

\end{document}