Seven Day Black and White Challenge: Day 4 / 七天黑白照片挑战 第四天

Thanks @tvb for nominating me to participate in this challenge.
是我想参与这个挑战赛，刷刷照片也不错。

規則如下：

7張代表你生活一部分的黑白照片
一天发出一張照片
没有人的照片
没有解释
每天提名一个人但任何人都可参加
其中一個标签必須用: #sevendaybnwchallenge
The rules :

Take 7 black & white photos that represent an aspect of your life
Present one image every day for seven days
No people
No explanation
Nominate someone every day. Although anyone can join in
Use the tag: #sevendaybnwchallenge as one of your five tags