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HTML

              
                <body>
<div class="gps-button-wrapper">
	<a class="gps-button" href="#">Subtle Glowing Button Test</a>
</div>
	<p>Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.</p>
<p>The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.</p>
<div class="gps-button-wrapper">
	<a class="gps-button" href="#" data-aos="fade-up">Surprise Button!</a>
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque sem lorem, maximus sit amet erat a, gravida commodo augue. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Etiam quis rhoncus diam, et molestie libero. Pellentesque finibus ornare ligula condimentum sagittis. Morbi nec turpis molestie, consectetur arcu nec, ultrices leo. Quisque urna lorem, luctus sit amet nunc ac, volutpat finibus metus. Donec diam neque, sodales nec mauris et, volutpat finibus ipsum. Sed sed luctus diam. Vivamus cursus auctor vehicula. Pellentesque viverra, sapien in vehicula convallis, felis massa pulvinar elit, eget tempor est ante accumsan sapien. Sed sit amet pulvinar eros.</p>
<p>Aliquam aliquam nisl ut purus placerat, eget ultricies ligula suscipit. In tincidunt ut eros nec porta. Quisque in ex urna. Nulla at porttitor massa, sit amet pretium tortor. Nam lobortis a tellus vitae suscipit. Sed convallis ultricies metus imperdiet consequat. Integer pharetra orci leo, et vestibulum sapien hendrerit at. Morbi volutpat ex felis, aliquam maximus nibh pretium et. Donec vitae eros id elit rhoncus malesuada. Duis ullamcorper malesuada ligula, ac dapibus nisi commodo vitae.</p>
<p class="credit">
	This on-scroll animation uses  Michał Sajnóg's AOS Animate on Scroll Library available <a href="http://michalsnik.github.io/aos/" target="_blank">on Github</a>. To learn more, <a href="https://github.com/michalsnik/aos" target="_blank">read the documentation</a>.
</p>
</body>
              
            
!

CSS

              
                /* General Formatting
------------------------*/
body {
	background-color: ##f1efed;
	max-width: 900px;
	margin: 75px auto;
}

p {
	color: #333;
	font: 15px/1.45 Open Sans;
	margin: 0 auto 1.45em;
	max-width: 70ch;
}

.gps-button-wrapper { 
	text-align: center;
	margin: 50px auto;
}

/* BUTTON STYLES
------------------------*/
.gps-button-wrapper .gps-button {
	background-color: #fd2c5a;
	display: inline-block;
	color: #fff;
	font: bold 30px/1.25 "Raleway", Helvetica, Arial, sans-serif;
	text-decoration: none;
	padding: 15px 35px;
	position: relative;
	overflow: hidden;
	border-radius: 100px;
	
	animation: glow-effect 1.5s linear infinite alternate;
}

@keyframes glow-effect {
	0% {
		box-shadow: 0 0 35px 15px pink, 0 0 35px pink;
		background-color: #fd2c5a;
	}
	
	100% {
		box-shadow: 0 0 35px pink;
		background-color: #ff174a;
	}
}

.gps-button-wrapper .gps-button {
	background: linear-gradient(55deg, #ff174a 15%, #ff5a7e 37%, #ff174a 40%) center right / 300% 100% no-repeat;
	transition: all .75s ease-in-out;
}
.gps-button-wrapper .gps-button:hover {
	background-position: center left;
}

/* SCROLL ANIMATION
------------------------*/
[data-aos^=fade] {
    opacity: 0;
    transition-property: opacity, transform
}

[data-aos^=fade].aos-animate {
    opacity: 1;
    transform: translate(0)
}

[data-aos=fade-up] {
    transform: translateY(50px)
}

/* CREDIT PARAGRAPH STYLE
----------------------------*/
p.credit {
	border-top: 2px solid #111;
	padding-top: 10px;
	font-style: italic;
	font-weight: bold;
	max-width: 73ch;
}
              
            
!

JS

              
                AOS.init({
 duration: 1200
});
              
            
!
999px

Console