\input{lib/preamble.tex}

\begin{document}
\begin{tikzpicture}[decoration={random steps,amplitude=0.15mm,segment length=0.3mm}]
  \draw[->] (-0.2,0) -- (8.2,0) node[anchor=north] {t};
  \draw[->] (0,-0.2) -- (0,4.2) node[anchor=east] {\# Geräte};

  \draw[help lines, dashed] (3,-0.4)--(3,3.8) (6,-0.4)--(6,3.8);

  \draw[color=scandioblue,decorate] (0,3.13)--(3,3.13)--(6,4.13)--(8,4.13);
  \draw[color=green!60!black,decorate] (0,2.8)--(3,2.8)--(6,3.8)--(8,3.8);

  \draw[color=scandiored,decorate] (0,3)--(3,3) (3,0)--(6,1)--(8,1);
  \draw[color=scandiored] (3,3)--(6,0);
  \draw[color=scandiored, thick] (3,2.9)--(3,3.1) (3,-0.1)--(3,0.1);
\end{tikzpicture}
\end{document}