diff --git a/square.py b/square.py
index c5f1cac..f1fb2a2 100644
--- a/square.py
+++ b/square.py
@@ -13,4 +13,5 @@ def square(side_length):
 sizes = [20, 40, 60, 80, 100]
 for size in sizes:
     square(size)
+input()