save project

snake.py

@@ -62,9 +62,11 @@ while True:
         num2=random.randint(1,16)
         apple_x=30*num1-30
         apple_y=30*num2-30
-        score=score+1
+        score=score+10
     else:
-        position.pop(0)      
+        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