CSS Battle 19 black light

<div></div>
<style>
  body{
    background:#5776F6;
  }
  div {
    position:fixed;
    top:100px;
    left:0px;
    clip-path: polygon(100% 0,100% 100%,0 75%,0 25%);
    width: 400px;
    height: 100px;
    background: #191919;
  }
</style>