Simple Glitch Effect in Pure CSS

index.html

<a href="#" class="glitch">17</a>

style.css

body{
background-color: #000;
}
    .glitch {
    font-size: 130px;
    line-height: 1;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    position:absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    text-decoration: none;
    color: #fff;
}
.glitch::before { 
        display: block;
        content: '24';
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        width: 100%;
        opacity: .8;   
        color: #0ff;
        z-index: -1;
}
.glitch::after {   
        display: block;
        content: '24';
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        width: 100%;
        opacity: .8;    
        color: #f0f;
        z-index: -2;
}
@keyframes glitch {
    0% {
        transform: translate(0)
    }
    20% {
        transform: translate(-5px, 5px)
    }
    40% {
        transform: translate(-5px, -5px)
    }
    60% {
        transform: translate(5px, 5px)
    }
    80% {
        transform: translate(5px, -5px)
    }
    to {
        transform: translate(0)
    }
}
.glitch:hover::before {
            animation: glitch .3s cubic-bezier(.25, .46, .45, .94) both infinite
}
.glitch:hover::after {
            animation: glitch .3s cubic-bezier(.25, .46, .45, .94) reverse both infinite
}