.text{position:relative;font-size:30px;font-weight:600}
.text.first-text{color:#333}
.text.sec-text{color:#4070F4}
.text.sec-text:before{content:"";position:absolute;top:0;left:0;height:100%;width:100%;background-color:#ffffff;border-left:2px solid #4070F4;animation:animate 4s steps(12) infinite}
@keyframes animate{40%,60%{left:calc(100% + 4px)}100%{left:0%}}