diff --git a/cards.py b/cards.py
index 1166696..4cc9bbf 100644
--- a/cards.py
+++ b/cards.py
@@ -85,6 +85,8 @@ def AI(hand: list, face_up: str) -> str:
     #     return 'surrender'
     # else:
     evaluation = cards_eval(hand, "player")
+    if max(evaluation) == 11:
+    	return 'double down'
     if max(evaluation) <= 17:
         return 'hit'
     else:
@@ -100,7 +102,7 @@ def has_blackjack_occured(hand: list):
     return False
     
 
-def blackjack(shoe: iter, dealer_hand: list=[], player_hand: list =[]) -> str:
+def blackjack(shoe: iter, dealer_hand: list=[], player_hand: list =[], bet: int =10) -> str:
     """Single blackjack round
 
     Args:
@@ -123,6 +125,7 @@ def blackjack(shoe: iter, dealer_hand: list=[], player_hand: list =[]) -> str:
         if decision == 'hit':
             player_hand.append(next(shoe))
         elif decision == 'double down':
+            bet *= 2
             player_hand.append(next(shoe))
         elif decision == 'split':
             #this wont work!
@@ -132,7 +135,7 @@ def blackjack(shoe: iter, dealer_hand: list=[], player_hand: list =[]) -> str:
             #so both wager have the same dealer_value!
             ##this will work reccursevly
             player_hand = player_hand[0]
-            blackjack(shoe, dealer_hand, player_hand)#new wager start
+            blackjack(shoe, dealer_hand, player_hand, bet)#new wager start
             #old wager continue
         elif decision == 'surrender':
             break
@@ -148,17 +151,17 @@ def blackjack(shoe: iter, dealer_hand: list=[], player_hand: list =[]) -> str:
     print(f"Dealer's deck value: {dealer_value}")
     print(f"Player's deck value: {player_value}")
     if player_value == 21 and has_blackjack_occured(player_hand):
-    	return 'player blackjack'
+    	return 'player blackjack', bet
     elif player_value > 21:
-        return 'dealer win'
+        return 'dealer win', bet
     elif dealer_value > 21:
-        return 'player win'
+        return 'player win', bet
     elif player_value > dealer_value:
-        return 'player win'
+        return 'player win', bet
     elif player_value == dealer_value:
-        return 'push' #keep money, no win no lose 0$
+        return 'push', bet #keep money, no win no lose 0$
     else:
-        return 'dealer win'
+        return 'dealer win', bet
     #TODO: add adidtional return with wager value like +10$ or -20$
 
 def game_loop(balance, bet) -> None:
@@ -171,20 +174,20 @@ def game_loop(balance, bet) -> None:
     #round start
         try:
             balance -= bet
-            result = blackjack(shoe_iter)
+            result, game_bet = blackjack(shoe_iter, bet=bet)
         except StopIteration:
             break
         if result == 'player win':
             wins += 1
-            balance += (2*bet)
+            balance += (2*game_bet)
         elif result == 'player blackjack':
             wins += 1
             player_blackjack += 1
-            balance += (2*bet) + (bet/2)
+            balance += (2*game_bet) + (game_bet/2)
         elif result == 'dealer win':
             losses += 1
         elif result == 'push':
-            balance += bet
+            balance += game_bet
             draws += 1
         if result in notable_results:
             print(result)
@@ -206,7 +209,7 @@ if __name__ == '__main__':
     import time
     #don't use time.time() for counting code execution time!
     start = time.perf_counter()
-    for i in range(1000):
+    for i in range(100):
         wins, loses, draws, balance, p_blackjack = game_loop(balance, bet)
         total_wins += wins
         total_losses += loses