I would like to add a few little coffee stains to my very important paper using coffee4 (http://hanno-rein.de/archives/349). When I try to get it to work, I end up with a PDF but no coffee stains. Literally, all I'm doing is working with the unmodified files in coffee4.tar.gz. Could you make a guess at what's going wrong and point me in the right direction?
Minimal assumed working example:
\documentclass{article}
\usepackage{tikz}
\usepackage{verbatim}
\usetikzlibrary{arrows,shapes}
\usepackage{coffee4}
\begin{document}
\title{LaTeX Coffee Stains}
\author{Hanno Rein\\
\texttt{http://hanno-rein.de}\\
Cambridge University}
\renewcommand{\today}{April 3, 2009}
\maketitle
\cofeAm{1}{1.0}{0}{5.5cm}{3cm}
\section{Introduction}
This package provides an essential feature to \LaTeX~that has been missing for too long. It adds a coffee stain to your documents. A lot of time can be saved by printing stains directly on the page rather than adding it manually. You can choose from four different stain types:
\begin{enumerate}
\item $270^\circ$ circle stain with two tiny splashes
\item $60^\circ$ circle stain
\item two splashes with light colours
\item and a colourful twin splash.
\end{enumerate}
\end{document}
