\documentclass[tikz]{standalone}
\begin{document}

\begin{tikzpicture}
\draw (-6,0)--(6,0);
\clip(-6,0) rectangle (6,6);
\foreach \y in {-8,-7.5,...,8}
\draw[orange] ({\y},0)--({\y-6*tanh(\y)},6);

\end{tikzpicture}
\end{document}