diff --git a/Makefile b/Makefile
index c9f4401..33b6ad3 100644
--- a/Makefile
+++ b/Makefile
@@ -2,10 +2,18 @@ docker-build-simple:
 	docker build -f Dockerfile.simple -t simple .
 
 docker-simple: docker-build-simple
-	docker run simple sh -c "bopytex -q 2 tpl_example.tex && cat 1_example.tex"
+	docker run simple sh -c "bopytex -q 2 tpl_example.tex && ls"
 
 docker-build-usecase:
 	docker build -f Dockerfile.usecase -t usecase .
 
 docker-usecase: docker-build-usecase
 	docker run usecase sh -c "bopytex -s students.csv tpl_example.tex && cat 1_example.tex"
+
+usecase-example: docker-build-usecase
+	docker run usecase sh -c "bopytex -s students.csv tpl_example.tex && cat joined_example.pdf" > example/usecase/joined_example.pdf
+
+simple-example:  docker-build-simple
+	docker run simple sh -c "bopytex -q 2 tpl_example.tex && cat joined_example.pdf" > example/simple/joined_example.pdf
+
+examples: usecase-example simple-example
diff --git a/README.md b/README.md
index f141b95..9ec6b1f 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ We have two variables
 
 ```
 
-To create a version a this document type this
+The following command produces the [joined_example.pdf](./example/simple/joined_example.pdf) document
 
 ``` bash
 $ bopytex tpl_simple.tex
@@ -58,11 +58,11 @@ To produce formulas and values, I use an another tool I an developing: `mapytex
 ``` python
 # bopytex_config.py
 from mapytex import Expression
-from random import random
+
+random.seed(0) # Controlling the seed allows to make subject reproductible
 
 direct_access = {
     "Expression": Expression,
-    "random": random
 }
 ```
 
@@ -83,6 +83,27 @@ Every variables, objects or function inside this file will be available inside t
 
 \Var{e.simplify()}
 
+
+\section{Variables}
+\subsection{subject}
+\begin{itemize}
+%- for k,v in subject.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
+\subsection{options}
+\begin{itemize}
+%- for k,v in options.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
+
 \end{document}
 ```
 
@@ -97,12 +118,13 @@ Information about my students are stored in a csv file (here `students.csv`)
 "Nicholas Taylor","28","n.taylor@randatmail.com","3","3"
 ```
 
-Then I can produce a subject for each of my student
+Then I can produce a [subject for each of my student](./example/usecase/joined_example.pdf)
 
 ``` bash
 $ bopytex tpl_simple.tex -s students.csv -c bopytex_config.py
 ```
 
+
 ## Running examples
 
 I build two examples base of the simple example and how I use it. They are playable through dockerfiles with make commands.
diff --git a/example/simple/joined_example.pdf b/example/simple/joined_example.pdf
index a1c4cac..2b70072 100644
Binary files a/example/simple/joined_example.pdf and b/example/simple/joined_example.pdf differ
diff --git a/example/simple/tpl_example.tex b/example/simple/tpl_example.tex
index c02be2c..8e32a89 100644
--- a/example/simple/tpl_example.tex
+++ b/example/simple/tpl_example.tex
@@ -22,9 +22,23 @@ We have two variables
 
 \section{Variables}
 \subsection{subject}
-\Var{subject}
+\begin{itemize}
+%- for k,v in subject.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
 \subsection{options}
-\Var{options}
+\begin{itemize}
+%- for k,v in options.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
 
 
 \end{document}
diff --git a/example/usecase/bopytex_config.py b/example/usecase/bopytex_config.py
index 014a874..6c7f402 100644
--- a/example/usecase/bopytex_config.py
+++ b/example/usecase/bopytex_config.py
@@ -1,3 +1,7 @@
+import random
+
 from mapytex import Expression
 
-direct_access = {"Expression": Expression}
+random.seed(0)
+
+direct_access = {"Expression": Expression, "random": random.random}
diff --git a/example/usecase/joined_example.pdf b/example/usecase/joined_example.pdf
index fb2fd5d..4f06db1 100644
Binary files a/example/usecase/joined_example.pdf and b/example/usecase/joined_example.pdf differ
diff --git a/example/usecase/tpl_example.tex b/example/usecase/tpl_example.tex
index c69211e..80d128f 100644
--- a/example/usecase/tpl_example.tex
+++ b/example/usecase/tpl_example.tex
@@ -15,8 +15,22 @@
 
 \section{Variables}
 \subsection{subject}
-\Var{subject}
+\begin{itemize}
+%- for k,v in subject.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
 \subsection{options}
-\Var{options}
+\begin{itemize}
+%- for k,v in options.items()
+    \item
+\begin{verbatim}
+    \Var{k}: \Var{v}
+\end{verbatim}
+%- endfor
+\end{itemize}
 
 \end{document}