CodePen Embed - Glitch background animation CSS

<div class="box">
   <div class="glitch">
      <div class="glitch__img"></div>
      <div class="glitch__img"></div>
      <div class="glitch__img"></div>
      <div class="glitch__img"></div>
      <div class="glitch__img"></div>
   </div>
</div>

* {
   margin:0;
   padding:0;
}
body, html {
   width:100%;
   height:100%;
}
body {
   background:#4c6c79;
}
.box {
	--glitch-width: 80vmax;
	--glitch-height: calc(80vmax * 1.25);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  width: 100%;
}
.glitch {
    position: relative;
    width: var(--glitch-width);
    max-width: 500px;
    height: var(--glitch-height);
    max-height: calc(500px * 1.25);
    overflow: hidden;
    margin: 0 auto;
   --gap-horizontal: 5px;
	--gap-vertical: 20px;
	--time-anim: 5s;
	--blend-mode-1: none;
	--blend-mode-2: exclusion;
	--blend-mode-3: hard-light;
	--blend-mode-4: overlay;
	--blend-mode-5: none;
	--blend-color-1: transparent;
	--blend-color-2: #52f1cd;
	--blend-color-3: #525df1;
	--blend-color-4: #f19b52;
	--blend-color-5: transparent;
}
.glitch:hover {
    cursor: pointer;
}
.glitch__img {
    position: absolute;
    top: calc(-1 * var(--gap-vertical));
    left: calc(-1 * var(--gap-horizontal));
    width: calc(100% + var(--gap-horizontal) * 2);
    height: calc(100% + var(--gap-vertical) * 2);
    background-color: var(--blend-color-1);
    background-size: cover;
    transform: translate3d(0,0,0);
    background-blend-mode: var(--blend-mode-1);
}
.glitch__img:nth-child(1) {
	background: url(https://i.imgur.com/ImjPE3M.jpg) no-repeat 50% 0;
   background-size: cover;
}

.glitch__img:nth-child(2) {
	background-color: var(--blend-color-2);
	background-blend-mode: var(--blend-mode-2);
}

.glitch__img:nth-child(3) {
	background-color: var(--blend-color-3);
	background-blend-mode: var(--blend-mode-3);
}

.glitch__img:nth-child(4) {
	background-color: var(--blend-color-4);
	background-blend-mode: var(--blend-mode-4);
}

.glitch__img:nth-child(5) {
	background-color: var(--blend-color-5);
	background-blend-mode: var(--blend-mode-5);
   background: url(https://i.imgur.com/5wt4hKa.jpg) no-repeat 50% 0;
}

.glitch__img:nth-child(n+2) {
	opacity: 0;
}

.glitch:hover .glitch__img:nth-child(n+2) {
	opacity: 1;
}

.glitch:hover .glitch__img:nth-child(2) {
	transform: translate3d(var(--gap-horizontal),0,0);
	animation: glitch-anim-1-horizontal var(--time-anim) infinite linear alternate;
}

.glitch:hover .glitch__img:nth-child(3) {
	transform: translate3d(calc(-1 * var(--gap-horizontal)),0,0);
	animation: glitch-anim-2-horizontal var(--time-anim) infinite linear alternate;
}

.glitch:hover .glitch__img:nth-child(4) {
	transform: translate3d(0, calc(-1 * var(--gap-vertical)), 0) scale3d(-1,-1,1);
	animation: glitch-anim-3-horizontal var(--time-anim) infinite linear alternate;
}

.glitch:hover > .glitch__img:nth-child(5) {
    animation: glitch-anim-flash 0.5s steps(1,end) infinite;
}

@keyframes glitch-anim-1-horizontal {
	0% { 
		-webkit-clip-path: polygon(0 2%, 100% 2%, 100% 5%, 0 5%);
		clip-path: polygon(0 2%, 100% 2%, 100% 5%, 0 5%);
	}
	10% {
		-webkit-clip-path: polygon(0 15%, 100% 15%, 100% 15%, 0 15%);
		clip-path: polygon(0 15%, 100% 15%, 100% 15%, 0 15%);
	}
	20% {
		-webkit-clip-path: polygon(0 10%, 100% 10%, 100% 20%, 0 20%);
		clip-path: polygon(0 10%, 100% 10%, 100% 20%, 0 20%);
	}
	30% {
		-webkit-clip-path: polygon(0 1%, 100% 1%, 100% 2%, 0 2%);
		clip-path: polygon(0 1%, 100% 1%, 100% 2%, 0 2%);
	}
	40% {
		-webkit-clip-path: polygon(0 33%, 100% 33%, 100% 33%, 0 33%);
		clip-path: polygon(0 33%, 100% 33%, 100% 33%, 0 33%);
	}
	50% {
		-webkit-clip-path: polygon(0 44%, 100% 44%, 100% 44%, 0 44%);
		clip-path: polygon(0 44%, 100% 44%, 100% 44%, 0 44%);
	}
	60% {
		-webkit-clip-path: polygon(0 50%, 100% 50%, 100% 20%, 0 20%);
		clip-path: polygon(0 50%, 100% 50%, 100% 20%, 0 20%);
	}
	70% {
		-webkit-clip-path: polygon(0 70%, 100% 70%, 100% 70%, 0 70%);
		clip-path: polygon(0 70%, 100% 70%, 100% 70%, 0 70%);
	}
	80% {
		-webkit-clip-path: polygon(0 80%, 100% 80%, 100% 80%, 0 80%);
		clip-path: polygon(0 80%, 100% 80%, 100% 80%, 0 80%);
	}
	90% {
		-webkit-clip-path: polygon(0 50%, 100% 50%, 100% 55%, 0 55%);
		clip-path: polygon(0 50%, 100% 50%, 100% 55%, 0 55%);
	}
	100% {
		-webkit-clip-path: polygon(0 70%, 100% 70%, 100% 80%, 0 80%);
		clip-path: polygon(0 70%, 100% 70%, 100% 80%, 0 80%);
	}
}

@keyframes glitch-anim-2-horizontal {
	0% { 
		-webkit-clip-path: polygon(0 25%, 100% 25%, 100% 30%, 0 30%);
		clip-path: polygon(0 25%, 100% 25%, 100% 30%, 0 30%);
	}
	15% {
		-webkit-clip-path: polygon(0 3%, 100% 3%, 100% 3%, 0 3%);
		clip-path: polygon(0 3%, 100% 3%, 100% 3%, 0 3%);
	}
	22% {
		-webkit-clip-path: polygon(0 5%, 100% 5%, 100% 20%, 0 20%);
		clip-path: polygon(0 5%, 100% 5%, 100% 20%, 0 20%);
	}
	31% {
		-webkit-clip-path: polygon(0 20%, 100% 20%, 100% 20%, 0 20%);
		clip-path: polygon(0 20%, 100% 20%, 100% 20%, 0 20%);
	}
	45% {
		-webkit-clip-path: polygon(0 40%, 100% 40%, 100% 40%, 0 40%);
		clip-path: polygon(0 40%, 100% 40%, 100% 40%, 0 40%);
	}
	51% {
		-webkit-clip-path: polygon(0 52%, 100% 52%, 100% 59%, 0 59%);
		clip-path: polygon(0 52%, 100% 52%, 100% 59%, 0 59%);
	}
	63% {
		-webkit-clip-path: polygon(0 60%, 100% 60%, 100% 60%, 0 60%);
		clip-path: polygon(0 60%, 100% 60%, 100% 60%, 0 60%);
	}
	76% {
		-webkit-clip-path: polygon(0 75%, 100% 75%, 100% 75%, 0 75%);
		clip-path: polygon(0 75%, 100% 75%, 100% 75%, 0 75%);
	}
	81% {
		-webkit-clip-path: polygon(0 65%, 100% 65%, 100% 40%, 0 40%);
		clip-path: polygon(0 65%, 100% 65%, 100% 40%, 0 40%);
	}
	94% {
		-webkit-clip-path: polygon(0 45%, 100% 45%, 100% 50%, 0 50%);
		clip-path: polygon(0 45%, 100% 45%, 100% 50%, 0 50%);
	}
	100% {
		-webkit-clip-path: polygon(0 14%, 100% 14%, 100% 33%, 0 33%);
		clip-path: polygon(0 14%, 100% 14%, 100% 33%, 0 33%);
	}
}

@keyframes glitch-anim-3-horizontal {
	0% { 
		-webkit-clip-path: polygon(0 1%, 100% 1%, 100% 3%, 0 3%);
		clip-path: polygon(0 1%, 100% 1%, 100% 3%, 0 3%);
	}
	5% {
		-webkit-clip-path: polygon(0 10%, 100% 10%, 100% 9%, 0 9%);
		clip-path: polygon(0 10%, 100% 10%, 100% 9%, 0 9%);
	}
	10% {
		-webkit-clip-path: polygon(0 5%, 100% 5%, 100% 6%, 0 6%);
		clip-path: polygon(0 5%, 100% 5%, 100% 6%, 0 6%);
	}
	25% {
		-webkit-clip-path: polygon(0 20%, 100% 20%, 100% 20%, 0 20%);
		clip-path: polygon(0 20%, 100% 20%, 100% 20%, 0 20%);
	}
	27% {
		-webkit-clip-path: polygon(0 10%, 100% 10%, 100% 10%, 0 10%);
		clip-path: polygon(0 10%, 100% 10%, 100% 10%, 0 10%);
	}
	30% {
		-webkit-clip-path: polygon(0 30%, 100% 30%, 100% 25%, 0 25%);
		clip-path: polygon(0 30%, 100% 30%, 100% 25%, 0 25%);
	}
	33% {
		-webkit-clip-path: polygon(0 15%, 100% 15%, 100% 16%, 0 16%);
		clip-path: polygon(0 15%, 100% 15%, 100% 16%, 0 16%);
	}
	37% {
		-webkit-clip-path: polygon(0 40%, 100% 40%, 100% 39%, 0 39%);
		clip-path: polygon(0 40%, 100% 40%, 100% 39%, 0 39%);
	}
	40% {
		-webkit-clip-path: polygon(0 20%, 100% 20%, 100% 21%, 0 21%);
		clip-path: polygon(0 20%, 100% 20%, 100% 21%, 0 21%);
	}
	45% {
		-webkit-clip-path: polygon(0 60%, 100% 60%, 100% 55%, 0 55%);
		clip-path: polygon(0 60%, 100% 60%, 100% 55%, 0 55%);
	}
	50% {
		-webkit-clip-path: polygon(0 30%, 100% 30%, 100% 31%, 0 31%);
		clip-path: polygon(0 30%, 100% 30%, 100% 31%, 0 31%);
	}
	53% {
		-webkit-clip-path: polygon(0 70%, 100% 70%, 100% 69%, 0 69%);
		clip-path: polygon(0 70%, 100% 70%, 100% 69%, 0 69%);
	}
	57% {
		-webkit-clip-path: polygon(0 40%, 100% 40%, 100% 41%, 0 41%);
		clip-path: polygon(0 40%, 100% 40%, 100% 41%, 0 41%);
	}
	60% {
		-webkit-clip-path: polygon(0 80%, 100% 80%, 100% 75%, 0 75%);
		clip-path: polygon(0 80%, 100% 80%, 100% 75%, 0 75%);
	}
	65% {
		-webkit-clip-path: polygon(0 50%, 100% 50%, 100% 51%, 0 51%);
		clip-path: polygon(0 50%, 100% 50%, 100% 51%, 0 51%);
	}
	70% {
		-webkit-clip-path: polygon(0 90%, 100% 90%, 100% 90%, 0 90%);
		clip-path: polygon(0 90%, 100% 90%, 100% 90%, 0 90%);
	}
	73% {
		-webkit-clip-path: polygon(0 60%, 100% 60%, 100% 60%, 0 60%);
		clip-path: polygon(0 60%, 100% 60%, 100% 60%, 0 60%);
	}
	80% {
		-webkit-clip-path: polygon(0 100%, 100% 100%, 100% 99%, 0 99%);
		clip-path: polygon(0 100%, 100% 100%, 100% 99%, 0 99%);
	}
	100% {
		-webkit-clip-path: polygon(0 70%, 100% 70%, 100% 71%, 0 71%);
		clip-path: polygon(0 70%, 100% 70%, 100% 71%, 0 71%);
	}
}
@keyframes glitch-anim-flash {
	0% { 
		opacity: 0.2; 
		transform: translate3d(var(--gap-horizontal), var(--gap-vertical), 0);
	}
	33%, 100% { 
		opacity: 0;
		transform: translate3d(0,0,0);
	}
}

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