save project

snake.py

@@ -54,7 +54,12 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    screen.blit(food, (ax,ay))
+    if ax==x and ay==y:
+        ax=30*random.randint(0,21)
+        ay=30*random.randint(0,15)
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -64,10 +69,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (ax,ay))
-    if ax==x and ay==y:
-        ax=random.randint(0,630)
-        ay=random.randint(0,450)
+
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(5)
\ No newline at end of file