<svg width="200" height="250" version="1.1" xmlns="http://www.w3.org/2000/svg">
  <!-- 多边形 -->
  <polygon points="50,10 55,30 70,30 60,40 65,55 50,45 35,55 40,40 30,30 45,30"
      stroke="green" fill="transparent" stroke-width="5"/>
</svg>

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.