save project

snake.py

@@ -52,8 +52,14 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
-    # 将背景图画上去
+    if x == apple_x and y== apple_y
+            num1=random.randint(1,22)
+            num2=random.randint(1,16)
+            apple_x=30*num1-30
+            apple_y=30*num2-30
+        else:
+                position.pop(0)
+    position.pop(0)    # 将景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])