diff --git a/week02/test.py b/week02/test.py
index b97db47..20ddd29 100644
--- a/week02/test.py
+++ b/week02/test.py
@@ -4,6 +4,10 @@ def hi():
     print(os.getcwd())
     print('hello, world')
 
+def by():
+    print('by, by')
+
 if __name__ == '__main__':
     print('hi')
     hi()
+    by()