* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background: linear-gradient(#8457FE, #05DBE4);
}
.line {
    position: absolute;
    width: 0;
    height: 100%;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    transform: scaleX(0.5);
}
.line::before {
    position: absolute;
    content: '';
    width: 4px;
    height: 16px;
    background-color: #fff;
    top: 0;
    left: -2px;
    opacity: .8;
    transform: translate3d(0, -100%, 0);
    animation: animate 1.5s ease-in infinite;
}
@keyframes animate {
    0 %{
        top: 0;
    }
    100% {
        top: 100%;
    }
}
.line:nth-child(1) {
    left: 15%;
}
.line:nth-child(1)::before {
    animation-delay: .5s;
}
.line:nth-child(2) {
    left: 35%;
}
.line:nth-child(2)::before {
    animation-delay: -0.2s;
}
.line:nth-child(3) {
    left: 50%;
}
.line:nth-child(3)::before {
    animation-delay: 0.8s;
}
.line:nth-child(4) {
    left: 65%;
}
.line:nth-child(4)::before {
    animation-delay: -0.4s;
}
.line:nth-child(5) {
    left: 85%;
}
.line:nth-child(5)::before {
    animation-delay: .9s;
}