save project

snake.py

@@ -55,10 +55,13 @@ while True:
     else:
         y += 30
     if apple_x == x and apple_y == y:
-        apple_x = random.randint(0,630)
-        apple_y = random.randint(0,450)
-    position.append((x, y))
+        a=random.randint(0,21)
+        b=random.randint(0,15)
+        apple_x = a*30
+        apple_y = b*30
+    else:
         position.pop(0)
+    position.append((x, y))
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去