CSS Loading Effect

<div class="spinner"> <div class="double-bounce1"></div> <div class="double-bounce2"></div> </div> 

.spinner { width: 40px; height: 40px; position: relative; margin: 100px auto; } .double-bounce1, .double-bounce2 { width: 100%; height: 100%; border-radius: 50%; background-color: #333; opacity: 0.6; position: absolute; top: 0; left: 0; -webkit-animation: sk-bounce 2.0s infinite ease-in-out; animation: sk-bounce 2.0s infinite ease-in-out; } .double-bounce2 { -webkit-animation-delay: -1.0s; animation-delay: -1.0s; } @-webkit-keyframes sk-bounce { 0%, 100% { -webkit-transform: scale(0.0) } 50% { -webkit-transform: scale(1.0) } } @keyframes sk-bounce { 0%, 100% { transform: scale(0.0); -webkit-transform: scale(0.0); } 50% { transform: scale(1.0); -webkit-transform: scale(1.0); } }