save project

snake.py

@@ -63,6 +63,7 @@ while True:
         score+=10
     else:
         position.pop(0)
+    
     position.append((x, y))
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -71,12 +72,13 @@ while True:
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])
-
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     info='score'+str(score)
-    text=my_font.render(info,True,(255,255,255))
+    text=my_font.render(info,True,(0,0,0))
     screen.blit(text,(540,10))
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file