auto save

snake.py

@@ -54,9 +54,12 @@ while True:
         y += 30
     position.append((x, y))
     if x==ax and y ==ay:
-        ax = random.randint(0,660)
-        ay = random.randint(0,480)
-    position.pop(0)
+        num1 = random.randint(0,21)
+        ax = num1*30
+        num2 = random.randint(0,15)
+        ay = num2*30
+    else:
+        position.pop(0)
     
     # 将背景图画上去
 
@@ -71,4 +74,4 @@ while True:
     screen.blit(food, (ax, ay))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
+    FPSCLOCK.tick(4)