save project

snake.py

@@ -54,7 +54,6 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    screen.blit(food, (ax,ay))
     if ax==x and ay==y:
         ax=30*random.randint(0,21)
         ay=30*random.randint(0,15)
@@ -64,6 +63,7 @@ while True:
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
+    screen.blit(food, (ax,ay))
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])