body {
    margin: 0;
    padding: 0;
    background: rgba(255, 255, 255, 0.5);
}

/* position */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 40px;
    display: flex;
    align-items: center;
}

.item {
    height: 50px;
    width: 5px;
    background: #0099CC; /* Blue color for .item elements */
    margin: 0 3px;
    border-radius: 10px;
    animation: loading 1s infinite;
}

/* animation */
@keyframes loading {
    0% {
        height: 0px;
    }

    50% {
        height: 50px;
    }

    100% {
        height: 0px;
    }
}

/* delay */
.item:nth-child(2) {
    animation-delay: 0.1s;
}

.item:nth-child(3) {
    animation-delay: 0.2s;
}

.item:nth-child(4) {
    animation-delay: 0.3s;
}

.item:nth-child(5) {
    animation-delay: 0.4s;
}

.item:nth-child(6) {
    animation-delay: 0.5s;
}

.item:nth-child(7) {
    animation-delay: 0.6s;
}

.item:nth-child(8) {
    animation-delay: 0.7s;
}