.sample{
  display:flex;
  align-items: center;
  justify-content: center;
}

.sample::before,
.sample::after{
  content: "";
  width:100px;
  border-top: 1px solid black;
}

.sample:before {
  margin-right: 1rem; 
}
.sample:after {
  margin-left: 1rem; 
}