.pulse {
  margin:10px;
  display: block;
  align: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  box-shadow: 0 0 0 #e5582d;
  animation: pulse 2s infinite;
}
.pulse:hover {
  animation: none;
}

@-webkit-keyframes pulse {
  0% {
    -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4);
  }
  70% {
      -webkit-box-shadow: 0 0 0 20px rgba(255, 255, 255, 0);
  }
  100% {
      -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }
}