.whatsapp {
  background-color: #25D366;
  width: 60px;
  height: 60px;
  border-radius: 50%;

  background-image: url("https://cdn-icons-png.flaticon.com/512/733/733585.png");
  background-size: 60%;
  background-repeat: no-repeat;
  background-position: center;

  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
  }
  70% {
    transform: scale(1.1);
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
  100% {
    transform: scale(1);
  }
}