diff --git a/pet_functions.py b/pet_functions.py
index 9774c0b..2629cd5 100644
--- a/pet_functions.py
+++ b/pet_functions.py
@@ -136,8 +136,8 @@ class Pet(object):
             time.sleep(15)
             self.decrease_hunger()
             if self.hunger <= 0:
-                decrease_health()
-                decrease_happiness()
+               self.decrease_health()
+               self.decrease_happiness()
 
 
   ### Activities ###
@@ -211,4 +211,4 @@ class Pet(object):
             print("Your pet woke up feeling rested and in a good mood.")
         else:
             print("Your pet has woken up.")
-        time.sleep(3)
\ No newline at end of file
+        time.sleep(3)
diff --git a/tamagotchi.py b/tamagotchi.py
index a3806da..8d29eae 100644
--- a/tamagotchi.py
+++ b/tamagotchi.py
@@ -14,9 +14,11 @@ fish = "<`)))><"
 owl = "(^0M0^)"
 
 # initializing the tamagotchi
-tamagotchi = Pet(name="empty", photo="empty", status="youngling", age=0, health=5, hunger=5, happiness=5, max_happiness=10, max_health=5, max_hunger=5, poke_count=0)
+tamagotchi = Pet(name="empty", photo="empty", status="youngling", age=0, health=5, hunger=5, happiness=5,
+                 max_happiness=10, max_health=5, max_hunger=5, poke_count=0)
 
- # A function which let's the player choose his pet.
+
+# A function which let's the player choose his pet.
 def beginning():
     global beginning_finished
     print("Which pet do you want to look after?")
@@ -35,11 +37,12 @@ def beginning():
     tamagotchi.photo = pet_photo
     beginning_finished = True
 
+
 # Beginning of the main routine which makes up the actual game.
 
 # thread which runs in the background to cause hunger, etc
-#t = threading.Thread(target=tamagotchi.decrease_stats())
-#t.start()
+t = threading.Thread(target=tamagotchi.decrease_stats())
+t.start()
 # Only starts if the pet is still alive.
 while tamagotchi.is_alive():
     if not beginning_finished:
@@ -76,4 +79,4 @@ while tamagotchi.is_alive():
             tamagotchi.display_stats()
     except ValueError:
         tamagotchi.display_stats()
-print("Your pet died.")
\ No newline at end of file
+print("Your pet died.")