<svg width="100px" height="100px" version="1.1" xmlns="http://www.w3.org/2000/svg">
<!-- 画笔起点在 (10, 10) 处,然后绘制一个矩形 -->
<path stroke="green" fill="transparent" stroke-width="5" d="M10,10 H 90 V 90 H 10 L10,10"/>
</svg>
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.