- <div class="art">
- <div class="box lvl6">
- <div class="box lvl5">
- <div class="box lvl4">
- <div class="box lvl3">
- <div class="box lvl3">
- <div class="box lvl3">
- <div class="box lvl2">
- <div class="box lvl2">
- <div class="box lvl2">
- <div class="box lvl2">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- <div class="box lvl1">
- </div>
- </div>
- </div>
- </div>
- </div>
- </div>
- </div>
来源: http://www.phpxs.com/code/1006173/