started new snakes poster

+\documentclass{beamer}
+
+\usepackage[english]{babel}
+\usepackage[latin1]{inputenc}
+\usepackage[orientation=portrait,size=a0,scale=2]{beamerposter}
+\usepackage{textpos}
+\usepackage{picins}
+\usepackage{url}
+\usepackage{fancyvrb}
+\usepackage{relsize}
+
+\usepackage{tikz}
+\usetikzlibrary{shapes.callouts}
+
+\parindent=0pt
+\setbeamertemplate{navigation symbols}{}
+
+\def\smallskip{\vspace{5mm}}
+\def\medskip{\vspace{10mm}}
+\def\bigskip{\vspace{20mm}}
+
+\colorlet{title}{black!10}
+\colorlet{minor}{black!65}
+\colorlet{snakes}{green!30!black}
+\colorlet{python}{blue!30!black}
+\definecolor{popup}{rgb}{.6,1,.5}
+
+\def\*{\raise-.65ex\hbox{$\smash{
+      \includegraphics[height=1em]{snake-shadow.pdf}}$}}
+
+\def\section#1{\noindent\colorbox{title}{%
+    \hbox to \textwidth{\bfseries #1\hfill\strut\*}}\smallskip}
+
+\def\endparitem{\endgraf\egroup}
+\def\>{\par\bgroup
+  \let\par=\endparitem
+  \leftskip=1.4em\parindent=-1.4em
+  \indent\hbox to 1.4em{\hss
+    $\smash{\includegraphics[width=1em]{cartoon-python.pdf}}$
+  }\ignorespaces}
+\def\+{\par\bgroup
+  \let\par=\endparitem
+  \leftskip=2.8em\parindent=-1.4em
+  \indent\hbox to 1.4em{\hss
+    $\color{snakes}\smash{\bullet}$
+  }\ignorespaces}
+
+\def\PYk #1{{\color{snakes}#1}}
+\def\PYn #1{{\color{python}#1}}
+\def\PYc #1{{\color{minor}#1}}
+
+\begin{document}
+\begin{frame}[fragile]{}
+
+%%
+%% title & logos
+%%
+
+\begin{textblock}{14.4}(.5,.5)
+  \parpic{\includegraphics[height=13cm]{logo-snakes}\quad}
+  {\Large\bfseries a high-level Petri nets library}\\[15pt]
+  {\large Franck Pommereau}\\[30pt]
+  \small
+  IBISC/COSMO, university of vry/Paris-Saclay\\
+  23 boulevard de France, 91037 vry Cedex France\\[20pt]
+  \url{franck.pommereau@ibisc.univ-evry.fr}\\
+  \url{http://www.ibisc.univ-evry.fr/~fpommereau/SNAKES/}
+\end{textblock}
+
+\begin{textblock}{14.4}(.7,.5)
+  \null\hfill
+  \begin{tikzpicture}[xscale=4,yscale=4]
+    \node at (-2,0) {\includegraphics[width=150mm, height=150mm,
+      keepaspectratio=true]{logo-ibisc}};
+    \node at (1,1) {\includegraphics[width=58mm, height=58mm,
+      keepaspectratio=true]{logo-ueve}};
+    \node at (1,-1) {\includegraphics[width=65mm, height=65mm,
+      keepaspectratio=true]{logo-genopole}};
+  \end{tikzpicture}
+\end{textblock}
+
+%%
+%% left column
+%%
+
+\begin{textblock}{9}(.5,2.85)
+\section{SNAKES in a nutshell}
+
+\tikzstyle{popup}=[draw,rectangle callout,rounded corners=15,
+  text width=10cm,align=center,callout pointer width=7mm,
+  callout absolute pointer={(70:.5)},fill=popup]
+
+\begin{center}
+\begin{tikzpicture}[scale=12]
+  \node at (0,0) {\scalebox{-1}[1]{%
+      \includegraphics[scale=3]{oroborus.pdf}}};
+  \node[popup,callout relative pointer={(-70:2)}] at (90:1)
+    {SNAKES is a Python library};
+  \node[popup,callout relative pointer={(-150:2)}] at (40:1.4)
+    {Define and manipulate Petri nets};
+  \node[popup,callout relative pointer={(170:3)}] at (10:1.3)
+    {Very generic Petri net definition};
+  \node[popup,callout relative pointer={(150:4)}] at (-25:1.3)
+    {Annotations are Python expressions};
+  \node[popup,callout relative pointer={(80:4)}] at (-90:1)
+    {Tokens are Python objects};
+  \node[popup,cloud callout,cloud puffs=15,aspect=2.5,inner sep=-20pt,
+    cloud puff arc=120,callout relative pointer={(170:3)},
+    fill=blue!20,rounded corners=0] at (-45:1.7)
+    {\small Even SNAKES'\\[-20pt] net objects};
+  \node[popup,callout relative pointer={(50:4.5)}] at (-150:1.2)
+    {Fully reflexive for maximal flexibility};
+  \node[popup,cloud callout,cloud puffs=12,aspect=2.6,inner sep=-50pt,
+    cloud puff arc=140,callout relative pointer={(50:2)},
+    fill=blue!20,rounded corners=0] at (-130:1.5)
+    {\small Inspired\\[-20pt] by Emacs};
+  \node[popup,callout relative pointer={(10:3)}] at (170:1.2)
+    {Extensible with plugins};
+  \node at (0,0) {\includegraphics[scale=.5]{python-powered.pdf}};
+\end{tikzpicture}
+\end{center}
+
+%%
+%%
+%%
+
+\medskip
+\section{Plugins}
+
+\> {\color{snakes}\texttt{gv}}: draw Petri nets using GraphViz
+\> {\color{snakes}\texttt{ops}}: algebras of Petri nets compositions 
+   {\small\color{minor}(PBC, PNA, M-nets, \dots)} 
+\> {\color{snakes}\texttt{pids}}: dynamic processes creation and
+   destruction
+\> {\color{snakes}\texttt{labels}}: arbitrary objects annotations
+\> {\color{snakes}\texttt{let}}: variables assignation during computation 
+\> \dots {\color{minor}(your plugin here: try, it's easy)}
+
+%%
+%%
+%%
+
+\bigskip
+\section{ABCD for friendly modelling}
+
+\> process algebra with friendly Python-like syntax
+\> embeds full Python
+\> compiler shipped with SNAKES library
+\> generates Petri nets objects
+\> export to pictures or PNML files
+\> simulation and reachability analysis
+
+\vbox to 0pt{\vss\null\hfill
+  \includegraphics[width=18cm]{abcd-simul}
+  \vspace*{.2\baselineskip}}
+\vspace*{-\baselineskip}
+
+%%
+%%
+%%
+
+\bigskip
+\section{Neco for fast analysis}
+
+\> \L ukasz Fronc's companion tool {\small\color{minor}(available
+  separately at \url{https://code.google.com/p/neco-net-compiler/})}
+\> Neco compiles SNAKES Petri nets into fast native code
+  \+ optimised marking structure
+  \+ per-transition optimised firing
+\> reads PNML, ABCD, or net objects
+\> process-symmetries reductions
+\> state space exploration and LTL model-checking
+   {\small\color{minor}(using SPOT)}
+\> awarded at the \emph{model-checking contest\/} 2013
+  {\small\color{minor}(PETRI NETS conf.)}
+
+\vbox to 0pt{\vss\null\hfill
+  \begin{tikzpicture}
+    \node[inner sep=0pt] (neco) {\includegraphics[width=18cm]{neco.pdf}};
+    \node[below=-6pt] at (neco.south) {\scalebox{2.1}[1]{net
+        compiler\hskip 9pt\null}};
+  \end{tikzpicture}\hspace*{-12mm}
+  \vspace*{2.8\baselineskip}}
+
+%%
+%%
+%%
+
+\end{textblock}
+
+%%
+%% right column
+%%
+
+\def\section#1{\noindent{\bfseries #1}\smallskip}
+
+\begin{textblock}{5}(10,2.85)
+  \begin{tikzpicture}
+    \path[fill=title] (0,0) rectangle (40,100);
+  \end{tikzpicture}
+\end{textblock}
+
+\begin{textblock}{5}(10.2,3)
+
+%%
+%%
+%%
+
+\section{About SNAKES}
+
+\> free \& open source {\small (GNU LGPL)}
+\> works out of the box
+\> 81.5k lines of portable Python
+\> maintained for 10\texttt{+} years
+\> one permanent developer/user
+\> online documentation has\qquad 300\texttt{+} visitors per month
+
+%%
+%%
+%%
+
+\bigskip
+\section{SNAKES  vs GitHub's top 10 Python projects$^*$
+  {\color{minor}\small(on Nov. 2013)}}
+
+\vskip -1ex
+\begin{tikzpicture}[xscale=3.4,yscale=-2.5]
+\tikzstyle{project}=[left,anchor=base east,inner sep=0pt]
+\tikzstyle{bar}=[draw=blue!50!black,fill=blue!50!white,
+  anchor=base west,inner sep=0pt,name=bar]
+\tikzstyle{price}=[right,anchor=base west]
+\node[project] at (0,1) {\small django\;};
+\node[bar,text width=530] at (0,1) {\small\strut};
+\node[price,anchor=base east] at (bar.base east)
+  {\raise -.1ex\hbox{\small\$5.3M (432)}};
+\node[project] at (0,2) {\small\color{snakes}snakes\;};
+\node[bar,text width=270] at (0,2) {\small\strut};
+\begin{scope}[color=snakes]
+  \draw[clip] (bar.north west) rectangle (bar.south east)
+    node at (bar.center) {\includegraphics[scale=.2]{python-skin}};
+\end{scope}
+\node[price] at (bar.base east) {\small\$2.7M (2)};
+\node[project] at (0,3) {\small sick-beard\;};
+\node[bar,text width=260] at (0,3) {\small\strut};
+\node[price] at (bar.base east) {\small\$2.6M (110)};
+\node[project] at (0,4) {\small ipython\;};
+\node[bar,text width=230] at (0,4) {\small\strut};
+\node[price] at (bar.base east) {\small\$2.3M (236)};
+\node[project] at (0,5) {\small boto\;};
+\node[bar,text width=210] at (0,5) {\small\strut};
+\node[price] at (bar.base east) {\small\$2.1M (314)};
+\node[project] at (0,6) {\small reddit\;};
+\node[bar,text width=150] at (0,6) {\small\strut};
+\node[price] at (bar.base east) {\small\$1.5M (87)};
+\node[project] at (0,7) {\small sentry\;};
+\node[bar,text width=130] at (0,7) {\small\strut};
+\node[price] at (bar.base east) {\small\$1.3M (166)};
+\node[project] at (0,8) {\small tornado\;};
+\node[bar,text width=60] at (0,8) {\small\strut};
+\node[price] at (bar.base east) {\small\$0.6M (120)};
+\node[project] at (0,9) {\small requests\;};
+\node[bar,text width=30] at (0,9) {\small\strut};
+\node[price] at (bar.base east) {\small\$0.3M (275)};
+\node[project] at (0,10) {\small flask\;};
+\node[bar,text width=20] at (0,10) {\small\strut};
+\node[price] at (bar.base east) {\small\$0.2M (159)};
+\node[project] at (0,11) {\small httpie\;};
+\node[bar,text width=10] at (0,11) {\small\strut};
+\node[price] at (bar.base east) {\small\$0.1M (22)};
+\end{tikzpicture}
+
+estimated cost to develop {\color{minor}\small(generated using David A.
+  Wheeler's ``SLOCCount'')} and number of contributors
+  
+\hbox to \textwidth{\null\hfill\color{minor}\small $^*$ 10 most forked
+  or followed Python projects}
+
+%%
+%%
+%%
+
+\bigskip
+\section{Using SNAKES out of Python}
+
+\> write a binding in Cython
+
+\begin{Verbatim}[commandchars=\\\{\},fontsize=\small,xleftmargin=1.4em,
+  numbers=left,numbersep=30pt]
+\PYc{# this is Cython code}
+\PYk{cdef} \PYk{public} \PYk{int} \PYn{foo} (...):
+    \PYc{# Python with SNAKES here}
+\end{Verbatim}
+
+\> Cython compiles to C/C\texttt{++} \qquad with a \texttt{.h} file:
+
+\begin{Verbatim}[commandchars=\\\{\},fontsize=\small,xleftmargin=1.4em,
+  numbers=left,numbersep=30pt]
+\PYc{// this is C/C++ code}
+\PYk{extern} \PYk{int} \PYn{foo}(...);
+\end{Verbatim}
+
+\> use this API in your project
+
+%%
+%%
+%%
+
+\bigskip
+\section{Isn't Python slow?}
+
+\> {\color{snakes}no} for handling nets {\small\color{minor}even large
+   ones}
+\> {\color{red!30!black}yes} for firing transitions
+\> \raise -.1ex\hbox{\includegraphics[height=.9em]{neco.pdf}} is fast
+   at that! {;-)}
+
+%%
+%%
+%%
+
+\end{textblock}
+
+%%
+%% flush top
+%%
+
+\vspace*{150cm}
+\end{frame}
+\end{document}
\ No newline at end of file

 \documentclass{beamer}
 \documentclass{beamer}
 
 
 \usepackage[english]{babel}
 \usepackage[english]{babel}
-\usepackage[latin1]{inputenc}
-\usepackage[orientation=portrait,size=a0,scale=2]{beamerposter}
-\usepackage{textpos}
-\usepackage{picins}
+\usepackage[utf8]{inputenc}
+\usepackage[orientation=portrait,size=a4,scale=2]{beamerposter}
+\usepackage[absolute,overlay]{textpos}
 \usepackage{url}
 \usepackage{url}
-\usepackage{fancyvrb}
-\usepackage{relsize}
 
 
 \usepackage{tikz}
 \usepackage{tikz}
-\usetikzlibrary{shapes.callouts}
 
 
 \parindent=0pt
 \parindent=0pt
 \setbeamertemplate{navigation symbols}{}
 \setbeamertemplate{navigation symbols}{}
 
 
-\def\smallskip{\vspace{5mm}}
-\def\medskip{\vspace{10mm}}
-\def\bigskip{\vspace{20mm}}
+\setlength{\TPHorizModule}{1cm}
+\setlength{\TPVertModule}{1cm}
 
 
-\colorlet{title}{black!10}
-\colorlet{minor}{black!65}
-\colorlet{snakes}{green!30!black}
-\colorlet{python}{blue!30!black}
-\definecolor{popup}{rgb}{.6,1,.5}
-
-\def\*{\raise-.65ex\hbox{$\smash{
-      \includegraphics[height=1em]{snake-shadow.pdf}}$}}
-
-\def\section#1{\noindent\colorbox{title}{%
-    \hbox to \textwidth{\bfseries #1\hfill\strut\*}}\smallskip}
-
-\def\endparitem{\endgraf\egroup}
-\def\>{\par\bgroup
-  \let\par=\endparitem
-  \leftskip=1.4em\parindent=-1.4em
-  \indent\hbox to 1.4em{\hss
-    $\smash{\includegraphics[width=1em]{cartoon-python.pdf}}$
-  }\ignorespaces}
-\def\+{\par\bgroup
-  \let\par=\endparitem
-  \leftskip=2.8em\parindent=-1.4em
-  \indent\hbox to 1.4em{\hss
-    $\color{snakes}\smash{\bullet}$
-  }\ignorespaces}
-
-\def\PYk #1{{\color{snakes}#1}}
-\def\PYn #1{{\color{python}#1}}
-\def\PYc #1{{\color{minor}#1}}
+\def\minor #1{{\small\color{gray}#1}}
+\def\remark #1{\minor{(#1)}}
 
 
 \begin{document}
 \begin{document}
-\begin{frame}[fragile]{}
-
-%%
-%% title & logos
-%%
-
-\begin{textblock}{14.4}(.5,.5)
-  \parpic{\includegraphics[height=13cm]{logo-snakes}\quad}
-  {\Large\bfseries a high-level Petri nets library}\\[15pt]
-  {\large Franck Pommereau}\\[30pt]
-  \small
-  IBISC/COSMO, university of vry/Paris-Saclay\\
-  23 boulevard de France, 91037 vry Cedex France\\[20pt]
-  \url{franck.pommereau@ibisc.univ-evry.fr}\\
-  \url{http://www.ibisc.univ-evry.fr/~fpommereau/SNAKES/}
-\end{textblock}
-
-\begin{textblock}{14.4}(.7,.5)
-  \null\hfill
-  \begin{tikzpicture}[xscale=4,yscale=4]
-    \node at (-2,0) {\includegraphics[width=150mm, height=150mm,
-      keepaspectratio=true]{logo-ibisc}};
-    \node at (1,1) {\includegraphics[width=58mm, height=58mm,
-      keepaspectratio=true]{logo-ueve}};
-    \node at (1,-1) {\includegraphics[width=65mm, height=65mm,
-      keepaspectratio=true]{logo-genopole}};
-  \end{tikzpicture}
-\end{textblock}
-
-%%
-%% left column
-%%
-
-\begin{textblock}{9}(.5,2.85)
-\section{SNAKES in a nutshell}
-
-\tikzstyle{popup}=[draw,rectangle callout,rounded corners=15,
-  text width=10cm,align=center,callout pointer width=7mm,
-  callout absolute pointer={(70:.5)},fill=popup]
-
-\begin{center}
-\begin{tikzpicture}[scale=12]
-  \node at (0,0) {\scalebox{-1}[1]{%
-      \includegraphics[scale=3]{oroborus.pdf}}};
-  \node[popup,callout relative pointer={(-70:2)}] at (90:1)
-    {SNAKES is a Python library};
-  \node[popup,callout relative pointer={(-150:2)}] at (40:1.4)
-    {Define and manipulate Petri nets};
-  \node[popup,callout relative pointer={(170:3)}] at (10:1.3)
-    {Very generic Petri net definition};
-  \node[popup,callout relative pointer={(150:4)}] at (-25:1.3)
-    {Annotations are Python expressions};
-  \node[popup,callout relative pointer={(80:4)}] at (-90:1)
-    {Tokens are Python objects};
-  \node[popup,cloud callout,cloud puffs=15,aspect=2.5,inner sep=-20pt,
-    cloud puff arc=120,callout relative pointer={(170:3)},
-    fill=blue!20,rounded corners=0] at (-45:1.7)
-    {\small Even SNAKES'\\[-20pt] net objects};
-  \node[popup,callout relative pointer={(50:4.5)}] at (-150:1.2)
-    {Fully reflexive for maximal flexibility};
-  \node[popup,cloud callout,cloud puffs=12,aspect=2.6,inner sep=-50pt,
-    cloud puff arc=140,callout relative pointer={(50:2)},
-    fill=blue!20,rounded corners=0] at (-130:1.5)
-    {\small Inspired\\[-20pt] by Emacs};
-  \node[popup,callout relative pointer={(10:3)}] at (170:1.2)
-    {Extensible with plugins};
-  \node at (0,0) {\includegraphics[scale=.5]{python-powered.pdf}};
-\end{tikzpicture}
-\end{center}
-
-%%
-%%
-%%
-
-\medskip
-\section{Plugins}
-
-\> {\color{snakes}\texttt{gv}}: draw Petri nets using GraphViz
-\> {\color{snakes}\texttt{ops}}: algebras of Petri nets compositions 
-   {\small\color{minor}(PBC, PNA, M-nets, \dots)} 
-\> {\color{snakes}\texttt{pids}}: dynamic processes creation and
-   destruction
-\> {\color{snakes}\texttt{labels}}: arbitrary objects annotations
-\> {\color{snakes}\texttt{let}}: variables assignation during computation 
-\> \dots {\color{minor}(your plugin here: try, it's easy)}
-
-%%
-%%
-%%
-
-\bigskip
-\section{ABCD for friendly modelling}
-
-\> process algebra with friendly Python-like syntax
-\> embeds full Python
-\> compiler shipped with SNAKES library
-\> generates Petri nets objects
-\> export to pictures or PNML files
-\> simulation and reachability analysis
-
-\vbox to 0pt{\vss\null\hfill
-  \includegraphics[width=18cm]{abcd-simul}
-  \vspace*{.2\baselineskip}}
-\vspace*{-\baselineskip}
-
-%%
-%%
-%%
-
-\bigskip
-\section{Neco for fast analysis}
-
-\> \L ukasz Fronc's companion tool {\small\color{minor}(available
-  separately at \url{https://code.google.com/p/neco-net-compiler/})}
-\> Neco compiles SNAKES Petri nets into fast native code
-  \+ optimised marking structure
-  \+ per-transition optimised firing
-\> reads PNML, ABCD, or net objects
-\> process-symmetries reductions
-\> state space exploration and LTL model-checking
-   {\small\color{minor}(using SPOT)}
-\> awarded at the \emph{model-checking contest\/} 2013
-  {\small\color{minor}(PETRI NETS conf.)}
-
-\vbox to 0pt{\vss\null\hfill
-  \begin{tikzpicture}
-    \node[inner sep=0pt] (neco) {\includegraphics[width=18cm]{neco.pdf}};
-    \node[below=-6pt] at (neco.south) {\scalebox{2.1}[1]{net
-        compiler\hskip 9pt\null}};
-  \end{tikzpicture}\hspace*{-12mm}
-  \vspace*{2.8\baselineskip}}
-
-%%
-%%
-%%
-
-\end{textblock}
-
-%%
-%% right column
-%%
-
-\def\section#1{\noindent{\bfseries #1}\smallskip}
-
-\begin{textblock}{5}(10,2.85)
-  \begin{tikzpicture}
-    \path[fill=title] (0,0) rectangle (40,100);
-  \end{tikzpicture}
-\end{textblock}
-
-\begin{textblock}{5}(10.2,3)
-
-%%
-%%
-%%
-
-\section{About SNAKES}
-
-\> free \& open source {\small (GNU LGPL)}
-\> works out of the box
-\> 81.5k lines of portable Python
-\> maintained for 10\texttt{+} years
-\> one permanent developer/user
-\> online documentation has\qquad 300\texttt{+} visitors per month
-
-%%
-%%
-%%
-
-\bigskip
-\section{SNAKES  vs GitHub's top 10 Python projects$^*$
-  {\color{minor}\small(on Nov. 2013)}}
-
-\vskip -1ex
-\begin{tikzpicture}[xscale=3.4,yscale=-2.5]
-\tikzstyle{project}=[left,anchor=base east,inner sep=0pt]
-\tikzstyle{bar}=[draw=blue!50!black,fill=blue!50!white,
-  anchor=base west,inner sep=0pt,name=bar]
-\tikzstyle{price}=[right,anchor=base west]
-\node[project] at (0,1) {\small django\;};
-\node[bar,text width=530] at (0,1) {\small\strut};
-\node[price,anchor=base east] at (bar.base east)
-  {\raise -.1ex\hbox{\small\$5.3M (432)}};
-\node[project] at (0,2) {\small\color{snakes}snakes\;};
-\node[bar,text width=270] at (0,2) {\small\strut};
-\begin{scope}[color=snakes]
-  \draw[clip] (bar.north west) rectangle (bar.south east)
-    node at (bar.center) {\includegraphics[scale=.2]{python-skin}};
-\end{scope}
-\node[price] at (bar.base east) {\small\$2.7M (2)};
-\node[project] at (0,3) {\small sick-beard\;};
-\node[bar,text width=260] at (0,3) {\small\strut};
-\node[price] at (bar.base east) {\small\$2.6M (110)};
-\node[project] at (0,4) {\small ipython\;};
-\node[bar,text width=230] at (0,4) {\small\strut};
-\node[price] at (bar.base east) {\small\$2.3M (236)};
-\node[project] at (0,5) {\small boto\;};
-\node[bar,text width=210] at (0,5) {\small\strut};
-\node[price] at (bar.base east) {\small\$2.1M (314)};
-\node[project] at (0,6) {\small reddit\;};
-\node[bar,text width=150] at (0,6) {\small\strut};
-\node[price] at (bar.base east) {\small\$1.5M (87)};
-\node[project] at (0,7) {\small sentry\;};
-\node[bar,text width=130] at (0,7) {\small\strut};
-\node[price] at (bar.base east) {\small\$1.3M (166)};
-\node[project] at (0,8) {\small tornado\;};
-\node[bar,text width=60] at (0,8) {\small\strut};
-\node[price] at (bar.base east) {\small\$0.6M (120)};
-\node[project] at (0,9) {\small requests\;};
-\node[bar,text width=30] at (0,9) {\small\strut};
-\node[price] at (bar.base east) {\small\$0.3M (275)};
-\node[project] at (0,10) {\small flask\;};
-\node[bar,text width=20] at (0,10) {\small\strut};
-\node[price] at (bar.base east) {\small\$0.2M (159)};
-\node[project] at (0,11) {\small httpie\;};
-\node[bar,text width=10] at (0,11) {\small\strut};
-\node[price] at (bar.base east) {\small\$0.1M (22)};
-\end{tikzpicture}
-
-estimated cost to develop {\color{minor}\small(generated using David A.
-  Wheeler's ``SLOCCount'')} and number of contributors
-  
-\hbox to \textwidth{\null\hfill\color{minor}\small $^*$ 10 most forked
-  or followed Python projects}
-
-%%
-%%
-%%
-
-\bigskip
-\section{Using SNAKES out of Python}
-
-\> write a binding in Cython
-
-\begin{Verbatim}[commandchars=\\\{\},fontsize=\small,xleftmargin=1.4em,
-  numbers=left,numbersep=30pt]
-\PYc{# this is Cython code}
-\PYk{cdef} \PYk{public} \PYk{int} \PYn{foo} (...):
-    \PYc{# Python with SNAKES here}
-\end{Verbatim}
-
-\> Cython compiles to C/C\texttt{++} \qquad with a \texttt{.h} file:
-
-\begin{Verbatim}[commandchars=\\\{\},fontsize=\small,xleftmargin=1.4em,
-  numbers=left,numbersep=30pt]
-\PYc{// this is C/C++ code}
-\PYk{extern} \PYk{int} \PYn{foo}(...);
-\end{Verbatim}
-
-\> use this API in your project
-
-%%
-%%
-%%
 
 
-\bigskip
-\section{Isn't Python slow?}
+\begin{frame}[t]{}
 
 
-\> {\color{snakes}no} for handling nets {\small\color{minor}even large
-   ones}
-\> {\color{red!30!black}yes} for firing transitions
-\> \raise -.1ex\hbox{\includegraphics[height=.9em]{neco.pdf}} is fast
-   at that! {;-)}
+  %%
+  %% drawing grid
+  %%
 
 
-%%
-%%
-%%
+  \begin{textblock}{21}(0,0)
+    \begin{tikzpicture}[yellow!70,yscale=-1]
+      \draw[densely dotted] (0,0) grid (21,30);
+      \foreach \x in {1,...,20} {
+        \node at (\x,.5) {\x};
+        }
+      \foreach \y in {1,...,29} {
+        \node at (.5,\y) {\y};
+        }
+    \end{tikzpicture}
+  \end{textblock}
 
 
-\end{textblock}
+  %%
+  %% title & logos
+  %%
 
 
-%%
-%% flush top
-%%
 
 
-\vspace*{150cm}
 \end{frame}
 \end{frame}
-\end{document}
\ No newline at end of file
+\end{document}