.LBT{color: #8bc34a; text-align: center; padding: 100px 5px 0px 5px; font-size: 20px;}
.LB {position: relative; margin-top: 20px; width: 100%; height: 6px; background-color: #fdba2c;}
.B {content: ""; display: inline; position: absolute; width: 0; height: 100%; left: 50%; text-align: center;}
.B:nth-child(1) {background-color: #da4733; animation: L 3s linear infinite;}
.B:nth-child(2) {background-color: #3b78e7; animation: L 3s linear 1s infinite;}
.B:nth-child(3) {background-color: #fdba2c; animation: L 3s linear 2s infinite;}
@keyframes L {from {left: 50%; width: 0;z-index:100;} 33.3333% {left: 0; width: 100%;z-index: 10;} to {left: 0; width: 100%;}}