save project

snake.py

@@ -58,8 +58,10 @@ while True:
         num2= random.randint(1,16)
         apple_x = num1*30-30
         apple_y = num2*30-30
+        score+=10
     else:    
         position.pop(0)
+    if x < 0 or x > 630 or y < 0 or y > 450:    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -79,3 +81,4 @@ while True:
     pygame.display.update
     FPSCLOCK.tick(3)
     
+    
\ No newline at end of file