diff --git a/snake.py b/snake.py
index 366dba1..86939b2 100644
--- a/snake.py
+++ b/snake.py
@@ -17,7 +17,7 @@ left = pygame.image.load('left.png')        # 头 朝左
 up = pygame.image.load('up.png')            # 头 朝上
 down = pygame.image.load('down.png')        # 头 朝下
 
-my_font=pygame.font.Font("neuropol.ttf",18)
+my_font=pygame.font.Font('neuropol.ttf',18)
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
 apple_x=360
@@ -25,7 +25,7 @@ apple_y=300
 
 setheading = "right"
 snake_head = right
-
+score=0
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -60,8 +60,11 @@ while True:
         num2=random.randint(1,16)
         apple_x=30*num1-30
         apple_y=30*num2-30
+
     else:
         position.pop(0)
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -72,7 +75,8 @@ while True:
 
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))
-    info="Score"+str(score)
+    #绘制分数
+    info="Score："+str(score)
     text=my_font.render(info,True,(0,0,0))
     screen.blit(text,(540,10))
     # 刷新画面