<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg&quot;>

<line x1="10" y1="10" x2="10" y2="90" /><polyline points="30,0 30,90 80,90" fill="none" stroke="black" stroke-width="4"/>

</svg>

<style>
svg {

    background: #ccc;}svg line {    /* stroke: #999; */    stroke-width: 4;    fill: none;}@keyframes depict {    from {        stroke: red;        stroke-dashoffset: 200;    }    to {        stroke: red;        stroke-dashoffset: 0;    }}svg polyline{    stroke-dasharray: 200;    animation: depict 2s linear 0s 1 normal forwards;}

</style>