*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #434750;
    overflow: hidden;
}
.loader{
    position: relative;
    transform: skewY(-15deg) translateX(50px) translateY(50px);
    animation: animate 4s linear infinite;
}  
@keyframes animate{
    0%{
        filter: hue-rotate(0);
    }
    0%{
        filter: hue-rotate(360deg);
    }
} 
.loader::before{
    content: '';
    position: absolute;
    top: 300px;
    width: 300px;
    height: 200px;
    background: rgba(0, 0, 0, 0.1);
    transform-origin: bottom;
    transform: scaleX(45deg);
    filter: blur(20px);
}
.loader span{
    position:relative;
    width: 200px;
    height: 40px;
    display: block;
    background: #3e3f46;
    transition: 0.5s;
    z-index: var(--i);
    animation: animate1 5s ease-in-out infinite;
    animation-delay: calc(1.5s * var(--i));
}
@keyframes animate1{
    0%,100%{
        transform: translateX();
    }
    50%{
        transform: translateX(-70px);
    }
}
.loader span:hover{
    background: #33a3ee;
    transition: 0s;
}
.loader span::before{
    content: '';
    position: absolute;
    top: 0;
    left:-150px;
    width: 150px;
    height: 100%;
    background: #3e3f46;
    transform-origin:right;
    transform: skewY(45deg);
    transition: 0.5s;
}
.loader span:hover:before{
    background: #33a3ee;
    transition: 0s;
}
.loader span::after{
    content: '';
    position: absolute;
    top: -150px;
    left: 0;
    width: 100%;
    height: 150px;
    background: #3e3f46;
    transform-origin: bottom;
    transform: skewX(45deg);
    transition: 0.5s;
}
.loader span:hover::after{
    background: #33a3ee;
    transition: 0s;
}