
\documentclass{article}
  \usepackage[width=6cm]{geometry}
  \usepackage{tikz}
      \usetikzlibrary{snakes}
      \usetikzlibrary{decorations.footprints}
  \pagestyle{empty}
\begin{document}
\tikz\draw[double,thick,blue] (0,0) -- (\linewidth,0pt);

\tikz\draw[decorate,decoration=snake] (0,0) -- (\linewidth,0pt);

\tikz\draw[decorate,decoration=snake,shorten >= 4.2pt] (0,0) -- (\linewidth,0pt);

\tikz\draw[decorate,decoration={footprints,foot length=3ex},red] (0,0) -- (\linewidth,0pt);
\end{document}
