diff --git a/.gitignore b/.gitignore
index ebbd047..b1e713d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 *.snm
 *.synctex.gz
 *.toc
+*.dvi
diff --git a/carte-Europe.pdf b/carte-Europe.pdf
new file mode 100644
index 0000000..89ca67e
Binary files /dev/null and b/carte-Europe.pdf differ
diff --git a/présentation.pdf b/présentation.pdf
index 07da43d..5db7eb4 100644
Binary files a/présentation.pdf and b/présentation.pdf differ
diff --git a/présentation.tex b/présentation.tex
index a7a95b6..ac51ecc 100644
--- a/présentation.tex
+++ b/présentation.tex
@@ -186,7 +186,18 @@ Il s'agit d'un logiciel libre permettant de distribuer un service S3 sur diverse
 
 \subsection{Comment ça marche ?}
 \begin{frame}
-\todo{Grosse partie ici où j'explique comment ça marche en pratique}
+\begin{columns}
+\column{0.5 \linewidth}
+\input{schéma europe}
+\column{0.5 \linewidth}
+\begin{center}
+Chaque objet est dupliqué sur plusieurs zones différentes.\linebreak
+
+\onslide<13->{Si une zone devient indisponible, les autres continuent d'assurer le service.}\linebreak
+
+\onslide<13->{Cette redondance allège grandement la charge qui repose sur les administrateurs face aux incidents ou tracas du quotidien.}\linebreak
+\end{center}
+\end{columns}
 \end{frame}
 
 \subsection{Financement}
diff --git a/schéma europe.tex b/schéma europe.tex
new file mode 100644
index 0000000..1d14d75
--- /dev/null
+++ b/schéma europe.tex	
@@ -0,0 +1,49 @@
+\begin{tikzpicture}
+\node (carte) {\includegraphics[width=\textwidth]{carte-Europe.pdf}};
+
+% \personnage{position X}{position Y}{facteur d'échelle}
+\newcommand{\personnage}[4]
+{
+\fill[#4] ({#1-(0.4 * #3)},{#2-(0.9 * #3)}) .. controls ({#1-(0.4 * #3)},#2) and ({#1+(0.4 * #3)},#2) .. ({#1+(0.4 * #3)},{#2-(0.9 * #3)}) -- ({#1-(0.4 * #3)},{#2-(0.9 * #3)});
+\fill[#4] (#1,#2) circle ({0.25 * #3});
+}
+
+\onslide<1-12>{\personnage{-2.25}{-0.75}{0.75}{green}}
+\onslide<1-12>{\draw (-1.9,-1.6) rectangle ++(1,1.2);}
+\onslide<2-12>{\draw[fill=green] (-1.8,-1.525) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 1};}
+\onslide<7-12>{\draw[fill=red] (-1.8,-1.15) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 3};}
+\onslide<10-12>{\draw[fill=blue] (-1.8,-0.775) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 5};}
+\onslide<5-12>{\draw[fill=blue] (-1.35,-1.525) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 2};}
+\onslide<9-12>{\draw[fill=yellow] (-1.35,-1.15) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 4};}
+\onslide<11-12>{\draw[fill=red] (-1.35,-0.775) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 6};}
+
+\personnage{1.65}{1.5}{0.75}{blue}
+\draw (0.3,0.7) rectangle ++(1,1.2);
+\onslide<3->{\draw[fill=green] (0.4,0.775) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 1};}
+\onslide<7->{\draw[fill=red] (0.4,1.15) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 3};}
+\onslide<11->{\draw[fill=red] (0.4,1.525) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 6};}
+\onslide<4->{\draw[fill=blue] (0.85,0.775) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 2};}
+\onslide<10->{\draw[fill=blue] (0.85,1.15) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 5};}
+\onslide<12->{\draw[fill=green] (0.85,1.525) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 7};}
+
+\personnage{1.85}{-2.3}{0.75}{red}
+\draw (0.5,-3.15) rectangle ++(1,1.2);
+\onslide<3->{\draw[fill=green] (0.6,-3.075) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 1};}
+\onslide<6->{\draw[fill=red] (0.6,-2.7) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 3};}
+\onslide<11->{\draw[fill=red] (0.6,-2.325) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 6};}
+\onslide<5->{\draw[fill=blue] (1.05,-3.075) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 2};}
+\onslide<9->{\draw[fill=yellow] (1.05,-2.7) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 4};}
+\onslide<12->{\draw[fill=green] (1.05,-2.325) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 7};}
+
+\onslide<8->{\personnage{1.05}{-0.15}{0.75}{yellow}}
+\onslide<8->{\draw (-0.35,-1) rectangle ++(1,1.2);}
+\onslide<9->{\draw[fill=yellow] (-0.25,-0.925) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 4};}
+\onslide<12->{\draw[fill=green] (-0.25,-0.55) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 7};}
+%\draw (-0.25,-0.175) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 1};
+\onslide<10->{\draw[fill=blue] (0.2,-0.925) rectangle ++(0.35,0.3) node[pos=0.5, white] {\tiny 5};}
+%\onslide<12->{\draw[fill=green] (0.2,-0.55) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 7};}
+%\draw (0.2,-0.175) rectangle ++(0.35,0.3) node[pos=0.5] {\tiny 1};
+
+\onslide<13->{\draw[line width=0.25cm] (-2.15,-0.5) -- ++(1,-1);}
+\onslide<13->{\draw[line width=0.25cm] (-2.15,-1.5) -- ++(1,1);}
+\end{tikzpicture}
\ No newline at end of file