.hr1 {
margin: 5px 0;
height: 4px;
background: #ececec;
position: relative;
overflow: hidden;
border: none;
}
.hr1:after {
content: "";
height: 4px;
background: #FD2179;
position: absolute;
width: 20%;
top: 0;
animation: anim-hr 5s linear infinite;
}
@keyframes anim-hr {
0% {
left: -20%;
}
100% {
left: 100%;
}
}