* {
    padding: 0;
    margin: 0;
}

.loading {
    height: 40px;
    margin: 100px auto;
    display: flex;
    justify-content: center;
    position: absolute;
    top: 30%;
    left: 0px;
    right: 0px;
}

.loading span {
    width: 8px;
    height: 100%;
    border-radius: 4px;
    background-color: lightgreen;
    animation: load 1s ease infinite;
    margin: 0 2px;
}

@keyframes load {
    0%,
    100% {
        transform: scaleY(1.5);
        background-color: lightgreen;
    }
    50% {
        transform: scaleY(1);
        background-color: lightblue;
    }
}

.loading span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading span:nth-child(3) {
    animation-delay: 0.4s;
}

.loading span:nth-child(4) {
    animation-delay: 0.6s;
}

.loading span:nth-child(5) {
    animation-delay: 0.8s;
}