diff --git a/TicTacToe.py b/TicTacToe.py
index 14f56e2..c733b69 100644
--- a/TicTacToe.py
+++ b/TicTacToe.py
@@ -21,7 +21,7 @@ class Matrix:
         self.marked_case = 0
 
 
-    def winer(self):
+    def winer(self, show=False):
         '''
         Check if there is a winner
         return 0 if there is no winner yet
@@ -29,19 +29,41 @@ class Matrix:
         return 2 if player 2 win
         '''
 
+
         # Check vertical lines
         for column in range(GRID_COLS):
             if self.cases[0][column] == self.cases[1][column] == self.cases[2][column] != 0:
+                if show:
+                    color = PLAYER1_COLOR if self.cases[0][column] == 1 else PLAYER2_COLOR
+                    initial_pos = (column * CASE_SIZE + CASE_SIZE//2, 20)
+                    final_pos = (column * CASE_SIZE + CASE_SIZE//2, LENGHT - 20)
+                    pygame.draw.line(screen, color, initial_pos, final_pos, LINE_WIDTH)
                 return self.cases[0][column]
+            
         # Check horizontal lines
         for row in range(GRID_ROWS):
             if self.cases[row][0] == self.cases[row][1] == self.cases[row][2] != 0:
+                if show:
+                    color = PLAYER1_COLOR if self.cases[0][column] == 1 else PLAYER2_COLOR
+                    initial_pos = (20, row * CASE_SIZE + CASE_SIZE//2)
+                    final_pos = (WIDTH - 20, row * CASE_SIZE + CASE_SIZE//2)
+                    pygame.draw.line(screen, color, initial_pos, final_pos, LINE_WIDTH)
                 return self.cases[row][0]
        
         # Check diagonals
         if self.cases[0][0] == self.cases[1][1] == self.cases[2][2] != 0:
+            if show:
+                    color = PLAYER1_COLOR if self.cases[0][column] == 1 else PLAYER2_COLOR
+                    initial_pos = (20, 20)
+                    final_pos = (WIDTH - 20, LENGHT - 20)
+                    pygame.draw.line(screen, color, initial_pos, final_pos, LINE_WIDTH)
             return self.cases[0][0]
         if self.cases[0][2] == self.cases[1][1] == self.cases[2][0] != 0:
+            if show:
+                    color = PLAYER1_COLOR if self.cases[0][column] == 1 else PLAYER2_COLOR
+                    initial_pos = (20, LENGHT - 20)
+                    final_pos = (WIDTH - 20, 20)
+                    pygame.draw.line(screen, color, initial_pos, final_pos, LINE_WIDTH)
             return self.cases[0][2]
         # Check if there is no winner yet
         return 0
@@ -148,6 +170,7 @@ class Game:
         self.player = 1 #1 = X, 2 = O
         self.gamemode = 'ai' #1v1 or 1vAI
         self.running = True
+        self.ai_starts = False
         self.lines()
 
     def draw_figures(self, row, column):
@@ -188,12 +211,20 @@ class Game:
             self.gamemode = 'ai'
 
     def isover(self):
-        return self.matrix.winer() != 0 or self.matrix.isfull()
+        return self.matrix.winer(show=True) != 0 or self.matrix.isfull()
     
     def reset(self):
         self.__init__()
         screen.fill(BACKGROUND_COLOR)
         self.lines()
+        if self.ai_starts:
+            self.ai_first_move()
+
+    def ai_first_move(self):
+        if self.gamemode == 'ai' and self.player == self.ai.player and self.ai_starts:
+            row, column = self.ai.evaluate(self.matrix)
+            self.make_move(row, column)
+            self.ai_starts = False
 
 def main():
 
@@ -216,6 +247,11 @@ def main():
                 # g-gamemode
                 if event.key == pygame.K_g:
                     game.change_gamemode()
+                
+                # s-start
+                if event.key == pygame.K_s:
+                    game.ai_starts = not game.ai_starts
+                    game.ai_first_move()
 
                 #r-restart
                 if event.key == pygame.K_r:
@@ -255,5 +291,4 @@ def main():
                 game.running = False
 
         pygame.display.update()
-main()
-
+main()
\ No newline at end of file