diff --git a/examples/introduction.py b/examples/introduction.py
index 9345a7071d9a2d8e44e73283ef662f456966458e..8e1747997460a180d55765d7870881522b4d4030 100644
--- a/examples/introduction.py
+++ b/examples/introduction.py
@@ -1,3 +1,8 @@
+"""
+===============================
+Introduction example for course
+===============================
+"""
 from b_asic.core_operations import Addition, ConstantMultiplication
 from b_asic.signal_flow_graph import SFG
 from b_asic.special_operations import Delay, Input, Output