.load-bar {
    position: relative;
    width: 100%;
    height: 4px;
    background-color: #fdba2c;
}

.bar {
    content: "";
    display: inline;
    position: absolute;
    width: 0;
    height: 100%;
    left: 50%;
    text-align: center;
}

    .bar:nth-child(1) {
        background-color: #0078d7;
        animation: loading 3s linear infinite;
    }

    .bar:nth-child(2) {
        background-color: #da4733;
        animation: loading 3s linear 1s infinite;
    }

    .bar:nth-child(3) {
        background-color: #fdba2c;
        animation: loading 3s linear 2s infinite;
    }

@keyframes loading {
    from {
        left: 50%;
        width: 0;
        z-index: 100;
    }

    33.3333% {
        left: 0;
        width: 100%;
        z-index: 10;
    }

    to {
        left: 0;
        width: 100%;
    }
}