Document how to run the sandbox on the demo computer

README.md

@@ -29,3 +29,19 @@ python3 -m pip install sphinx sphinx_rtd_theme
 cd ./docs
 make html
 ```
+
+
+# Running the demo app on the sandbox computer
+
+To correctly import the wrapper on the demo machine, please follow theses steps :
+
+On the desktop, open the "PythonSandbox" directory. There, you should find the following files :
+- `env.sh`
+- `.venv/bin/activate`
+
+You must source theses two files within your terminal, then you may run any application which uses the wrapper.
+
+For example, to run the demo app (a simple level display), run the following 
+```bash
+python test.py
+```
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