diff --git a/hello.py b/hello.py
index 72647ca..09aed08 100755
--- a/hello.py
+++ b/hello.py
@@ -1,11 +1,12 @@
 #!/usr/bin/env python3
 
 def helloworld():
-    pass
+    print("Hello!")
 
 def add_numbers(x, y):
-    pass
+    return x + y
 
 if __name__ == '__main__':
     # do something!
-    pass
+    helloworld()
+