* {
    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) translate(50px,50px);
    animation: animatecolor 2.5s linear infinite;
}
@keyframes animatecolor {
    0% {
        filter: hue-rotate(0deg);
    }
    100% {
        filter: hue-rotate(360deg);
    }
}

.loader span {
    position:relative;
    width: 200px;
    height: 40px;
    background: #3e3f46;
    display: block;
    transition: .5s;
    z-index: var(--i);
    animation: animate 5s linear infinite;
    animation-delay: calc(var(--i)*0.4s);
}
@keyframes animate {
    0% {
        transform: translateX(0px);
    }
    25% {
        transform: translateX(100px);
    }
    75% {
        transform: translateX(-100px);
    }
    1000% {
        transform: translateX(0px);
    }
}
.loader span:hover {
    background: #33a3ee;
    transition: 0s;
}
.loader span:before {
    content: '';
    position: absolute;
    top: 0;
    left: -150px;
    height: 100%;
    width: 150px;
    background: #2e3133;
    transform-origin: right;
    transform: skewY(45deg);
    transition: .5s;

}
.loader span:hover:before {
    background: #1f5378;
    transition: 0s;

}
.loader:after {
    content: '';
    position: absolute;
    top: 300px;
    width: 300px;
    height: 200px;
    background-color: rgba(0,0,0,0.5);
    z-index: 0;
    transform-origin: bottom;
    transform:skewX(45deg);
filter: blur(15px);
}
.loader span:after {
    content: '';
    position: absolute;
    top: -150px;
    left: 00;
    background:#35383e;
    width: 100%;
    height: 150px;
    transition: .5s;
    transform-origin: bottom;
    transform: skewX(45deg);

}
.loader span:hover:after {
    background-color: #2982b9;
    transition: 0s;
}