"Circle Wave Radiation Effect"
Bootstrap 4.1.1 Snippet by mail2sundarg

<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"><div class="box"> <div class="circle-effect"> <h4>Hello</h4> </div> </div> </div> </div>
body { background-color: #000; } .circle-effect{ position: absolute; left: 10%; top: 15%; width: 100px; height: 100px; background: #ff2a22; border: 2px solid rgba(221, 221, 221, 0.8); border-radius: 50%; text-align: center; vertical-align: middle; color: #fff; -webkit-animation: ripple-white 1s linear infinite; animation: ripple-white 1s linear infinite; -webkit-transition: .5s linear; text-shadow: 1px 1px 1px #000; display: flex; align-items: center; justify-content: center; z-index: 4; } @-webkit-keyframes ripple-white { 0% { -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.1), 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.1), 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1) } 100% { -webkit-box-shadow: 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1), 0 0 0 60px rgba(255, 255, 255, 0); box-shadow: 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1), 0 0 0 60px rgba(255, 255, 255, 0) } } @keyframes ripple-white { 0% { -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.1), 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.1), 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1) } 100% { -webkit-box-shadow: 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1), 0 0 0 60px rgba(255, 255, 255, 0); box-shadow: 0 0 0 20px rgba(255, 255, 255, 0.1), 0 0 0 40px rgba(255, 255, 255, 0.1), 0 0 0 60px rgba(255, 255, 255, 0) } }

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