diff --git a/Tricks/test.py b/Tricks/test.py
index c5c5c4a..d2ce790 100644
--- a/Tricks/test.py
+++ b/Tricks/test.py
@@ -10,5 +10,12 @@ class TestTrick(Trick):
 	def delay(self):
 		return 1
 	
+	@property
+	def is_reversible(self):
+		return False
+	
+	def revert(self):
+		pass
+	
 	def run(self):
 		print("Test succeed")
diff --git a/main.py b/main.py
index d4d2758..39e450c 100755
--- a/main.py
+++ b/main.py
@@ -21,6 +21,8 @@ class AnonymousGoose:
 	def __del__(self):
 		if not self.stopped:
 			self.keyboard_listener.cancel()
+		for trick in self.tricks:
+			trick.revert()
 
 	def run(self):
 		next_trick_time = 5
@@ -34,7 +36,8 @@ class AnonymousGoose:
 					trick = Trick.get_random_trick()
 					next_trick_time = trick.delay
 					trick.run()
-					self.tricks.append(trick)
+					if trick.is_reversible:
+						self.tricks.append(trick)
 			except KeyboardInterrupt:
 				...
 
diff --git a/trick.py b/trick.py
index 96f7af8..e6ebfcc 100644
--- a/trick.py
+++ b/trick.py
@@ -12,6 +12,15 @@ class Trick(ABC):
 	@abstractmethod
 	def delay(self):
 		return 1
+
+	@property
+	@abstractmethod
+	def is_reversible(self):
+		raise NotImplementedError
+	
+	@abstractmethod
+	def revert(self):
+		raise NotImplementedError
 	
 	@abstractmethod
 	def run(self):