save project

snake.py

@@ -53,10 +53,12 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    
     if x ==apple_x and y ==apple_y:
-        apple_x=random.randint(0,660)
-        apple_y=random.randint(0,480)
+        apple_x=random.randint(0,21)*30
+        apple_y=random.randint(0,15)*30
+    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