@keyframes before {
  0% {
    width: 20px;
    height: 20px;
    border-top: 3px solid #f15a4a;
    border-left: 3px solid #f15a4a;
  }
  100% {
    width: 145px;
    height: 47px;
    border-top: 3px solid #f15a4a;
    border-left: 3px solid #f15a4a;
  }
}

@keyframes after {
  0% {
    width: 20px;
    height: 20px;
    border-bottom: 3px solid #f15a4a;
    border-right: 3px solid #f15a4a;
  }
  100% {
    width: 145px;
    height: 47px;
    border-bottom: 3px solid #f15a4a;
    border-right: 3px solid #f15a4a;
  }
}