<h1>CSS Pulse Effect</h1>

<div class="blobs-container">
	<div class="blob white"></div>
	<div class="blob red"></div>
	<div class="blob orange"></div>
	<div class="blob yellow"></div>
	<div class="blob blue"></div>
	<div class="blob green"></div>
	<div class="blob purple"></div>
	<div class="blob"></div>
</div>

<footer>
	<p>
		Created with <i class="fa fa-heart"></i> by
		<a target="_blank" href="https://florin-pop.com">Florin Pop</a>
		- Read how I created this
		<a target="_blank" href="https://www.florin-pop.com/blog/2019/03/css-pulse-effect/">here</a> - 
		Other projects on
		<a target="_blank" href="https://github.com/florinpop17/work-journal/">Github</a>
	</p>
</footer>
@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro');

* {
	box-sizing: border-box;
}

body {
	background-image: linear-gradient(to bottom, #cfd9df 0%, #e2ebf0 100%);
	font-family: 'Source Sans Pro', sans-serif;
	margin: 0;
	height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
}

.blobs-container {
	display: flex;
}

.blob {
	background: black;
	border-radius: 50%;
	box-shadow: 0 0 0 0 rgba(0, 0, 0, 1);
	margin: 10px;
	height: 20px;
	width: 20px;
	transform: scale(1);
	animation: pulse-black 2s infinite;
}

@keyframes pulse-black {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(0, 0, 0, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
	}
}

.blob.white {
	background: white;
	box-shadow: 0 0 0 0 rgba(255, 255, 255, 1);
	animation: pulse-white 2s infinite;
}

@keyframes pulse-white {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
	}
}

.blob.red {
	background: rgba(255, 82, 82, 1);
	box-shadow: 0 0 0 0 rgba(255, 82, 82, 1);
	animation: pulse-red 2s infinite;
}

@keyframes pulse-red {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 82, 82, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(255, 82, 82, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 82, 82, 0);
	}
}

.blob.orange {
	background: rgba(255, 121, 63, 1);
	box-shadow: 0 0 0 0 rgba(255, 121, 63, 1);
	animation: pulse-orange 2s infinite;
}

@keyframes pulse-orange {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 121, 63, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(255, 121, 63, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 121, 63, 0);
	}
}

.blob.yellow {
	background: rgba(255, 177, 66, 1);
	box-shadow: 0 0 0 0 rgba(255, 177, 66, 1);
	animation: pulse-yellow 2s infinite;
}

@keyframes pulse-yellow {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 177, 66, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(255, 177, 66, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255, 177, 66, 0);
	}
}

.blob.blue {
	background: rgba(52, 172, 224, 1);
	box-shadow: 0 0 0 0 rgba(52, 172, 224, 1);
	animation: pulse-blue 2s infinite;
}

@keyframes pulse-blue {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(52, 172, 224, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(52, 172, 224, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(52, 172, 224, 0);
	}
}

.blob.green {
	background: rgba(51, 217, 178, 1);
	box-shadow: 0 0 0 0 rgba(51, 217, 178, 1);
	animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(51, 217, 178, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(51, 217, 178, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(51, 217, 178, 0);
	}
}

.blob.purple {
	background: rgba(142, 68, 173, 1);
	box-shadow: 0 0 0 0 rgba(142, 68, 173, 1);
	animation: pulse-purple 2s infinite;
}

@keyframes pulse-purple {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(142, 68, 173, 0.7);
	}
	
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(142, 68, 173, 0);
	}
	
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(142, 68, 173, 0);
	}
}

footer {
    background-color: #222;
    color: #fff;
    font-size: 14px;
    bottom: 0;
    position: fixed;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 999;
}

footer p {
    margin: 10px 0;
}

footer i {
    color: red;
}

footer a {
    color: #3c97bf;
    text-decoration: none;
}

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.7.2/css/all.min.css

External JavaScript

This Pen doesn't use any external JavaScript resources.