<div class="item">
  Lorem ipsum dolor sit amet consectetur adipisicing elit. Nemo optio molestiae perferendis distinctio, id placeat aspernatur voluptates rem amet? Illo odit eaque at quas velit veritatis ipsa, earum optio dolorum maxime! Id blanditiis animi quam voluptate maiores ut? Quia, eum. Quod error atque aut aliquam aliquid vel temporibus harum doloribus?
</div>

.item{
  max-width: 800px;
  position: relative;
  background: #ccc;
  margin-top: 35px;
  padding: 0 20px 20px 30px;
  color: #fff;
  font-size: 24px
}

.item:after{
  content: "";
  width: 100%;
  height: 20px;
background-image: url("data:image/svg+xml,%3Csvg width='50' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cmask id='cp'%3E%3Crect width='100%25' height='100%25' fill='%23fff'/%3E%3Ccircle cx='25' r='10'/%3E%3C/mask%3E%3C/defs%3E%3Crect width='50' height='30' fill='%23ccc' mask='url(%23cp)'/%3E%3C/svg%3E");
  background-size: 45px 20px;
  position: absolute;
  top: -20px;
  left: 0;
}