代码编辑器：
x
1
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">2
<g fill="none" stroke="black" stroke-width="4">3
<path stroke-dasharray="5,5" d="M5 20 l215 0" />4
<path stroke-dasharray="10,10" d="M5 40 l215 0" />5
<path stroke-dasharray="20,10,5,5,5,10" d="M5 60 l215 0" />6
</g>7
</svg>8