Бегущая пунктирная полоса слева направо

.twelve_txt_1:after {
    content: "";
	opacity:1!important;
    height: 45px;
    width: 247px;
    position: absolute;
    bottom: 0;
    left: -0.5rem;
    outline: 1px solid transparent;
    background: linear-gradient(90deg, #C1FB78 50%, transparent 0) repeat-x, linear-gradient(0deg, #C1FB78 50%, transparent 0) repeat-y;
    background-size: 28px 49px, 0 0;
    background-position: 0 0, 0 100%, 0 0, 100% 0;
    animation-direction: reverse;
    animation-duration: 14s;
    animation-name: linearGradientMoveY;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
}
@keyframes linearGradientMoveY {
100% {
    background-position: 100%;
}
}