<div>
	<span id="I">H</span>
	<span id="T">A</span>
	<span id="I">L</span>
	<span id="T">L</span>
	<span id="I">🎃</span>
	<span id="T">W</span>
	<span id="I">E</span>
	<span id="T">E</span>
	<span id="I">N</span>
</div>

:root {
	--white:#f1f1f1
}
body {
	margin: 0;
	font-family: Montserrat;
	font-size: 40px;
	color: var(--white);
	letter-spacing: 0.7em;
	background-color: black;
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100vh;
}
div > span {
	opacity: 0.15;
}
#I {
	opacity: 1;
	animation: flickerI 2s linear  reverse infinite;
}
#I::after {
	content: '';
	width: 150%;
	-webkit-box-shadow: -35px 0px 60px 8px rgba(255,255,255,1);
	-moz-box-shadow: -35px 0px 60px 8px rgba(255,255,255,1);
	box-shadow: -35px 0px 60px 8px rgba(255,255,255,1);
}
#L, #G {
	animation: flickerLG 2s linear reverse infinite;
	position: relative;
}
#L::after, 
#L::before  {
	content:' ';
	width: 100px;
	height: 100px;
	background: var(--white);
	position: absolute;
	top: -50%;
	left: 100%;
	border-radius: 100%;
	opacity: 0.05;
	filter: blur(10px);
}
#L::after {
	width: 200px;
	height: 200px;
	top: -150%;
	left: -5%;
	opacity: 0.1;
	filter: blur(10px);
}
#H {
	animation: flickerH 2s linear reverse infinite
}

#T {
	animation: flickerH 2s linear reverse infinite
}

@keyframes flickerI {
	0% {
		opacity: 0.4;
	}
	5% {
		opacity: 0.5;
	}
	10% {
		opacity: 0.6;
	}
	15% {
		opacity: 0.85;
	}
	25% {
		opacity: 0.5;
	}
	30% {
		opacity: 1;
	}
	35% {
		opacity: 0.1;
	}
	40% {
		opacity: 0.25;
	}
	45% {
		opacity: 0.5;
	}
	60% {
		opacity: 1;
	}
	70% {
		opacity: 0.85;
	}
	80% {
		opacity: 0.4;
	}
	90% {
		opacity: 0.5;
	}
	100% {
		opacity: 1;
	}
}

@keyframes flickerLG {
	0% {
		opacity: 0.19;
	}
	5% {
		opacity: 0.2;
	}
	10% {
		opacity: 0.25;
	}
	15% {
		opacity: 0.35;
	}
	25% {
		opacity: 0.2;
	}
	30% {
		opacity: 0.4;
	}
	35% {
		opacity: 0.1;
	}
	40% {
		opacity: 0.25;
	}
	45% {
		opacity: 0.2;
	}
	60% {
		opacity: 0.4;
	}
	70% {
		opacity: 0.35;
	}
	80% {
		opacity: 0.4;
	}
	90% {
		opacity: 0.2;
	}
	100% {
		opacity: 0.4;
	}
}

@keyframes flickerH {
	0% {
		opacity: 0.15;
	}
	5% {
		opacity: 0.2;
	}
	10% {
		opacity: 0.12;
	}
	15% {
		opacity: 0.2;
	}
	25% {
		opacity: 0.15;
	}
	30% {
		opacity: 0.4;
	}
	35% {
		opacity: 0.05;
	}
	40% {
		opacity: 0.12;
	}
	45% {
		opacity: 0.15;
	}
	60% {
		opacity: 0.3;
	}
	70% {
		opacity: 0.2;
	}
	80% {
		opacity: 0.3;
	}
	90% {
		opacity: 0.18;
	}
	100% {
		opacity: 0.3;
	}
}

@keyframes flickerT {
	0% {
		opacity: 0.01;
	}
	5% {
		opacity: 0.05;
	}
	10% {
		opacity: 0.03;
	}
	15% {
		opacity: 0.1;
	}
	25% {
		opacity: 0.07;
	}
	30% {
		opacity: 0.1;
	}
	35% {
		opacity: 0.05;
	}
	40% {
		opacity: 0.06;
	}
	45% {
		opacity: 0.1;
	}
	60% {
		opacity: 0.;
	}
	70% {
		opacity: 0.1;
	}
	80% {
		opacity: 0.;
	}
	90% {
		opacity: 0.0;
	}
	100% {
		opacity: 0.1;
	}
}