diff --git a/Observer/Observer.php b/Observer/Observer.php
index ea92b42..1cb07dc 100644
--- a/Observer/Observer.php
+++ b/Observer/Observer.php
@@ -59,7 +59,7 @@ class User implements \SplSubject
     }
 
     /**
-     * 
+     *
      *
      * @return void
      */
@@ -86,4 +86,9 @@ class User implements \SplSubject
         // notify the observers, that user has been updated
         $this->notify();
     }
-}
\ No newline at end of file
+}
+
+$user = new User();
+$user->attach(new UserObserver());
+
+$user->notify();