DarkCodeClone/loading3.css at master · geonwoomun/DarkCodeClone · GitHub

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body{
    margin:0;
    padding : 0;
    background: #2980b9;
}
.loading{
    position: absolute;
    top: 50%;
    left : 50%;
    transform: translate(-50%,-50%);
    height: 40px;
    display: flex;
    align-items : center;
}

.obj{
    width : 6px;
    height : 40px;
    background: white;
    margin : 0 3px;
    border-radius: 10px;
    animation: loading 0.8s infinite
}

.obj:nth-child(2){
    animation-delay : 0.1s
}
.obj:nth-child(3){
    animation-delay : 0.2s
}
.obj:nth-child(4){
    animation-delay : 0.3s
}
.obj:nth-child(5){
    animation-delay : 0.4s
}
.obj:nth-child(6){
    animation-delay : 0.5s
}
.obj:nth-child(7){
    animation-delay : 0.6s
}
.obj:nth-child(8){
    animation-delay : 0.7s
}

@keyframes loading{
    0%{
        height: 0;
    }
    50%{
        height: 40px;
    }
    100%{
        height: 0;
    }
}