.button {
  background-color: #52832b;
  -webkit-border-radius: 10px;
  color: #52832b;
  cursor: pointer;
  display: inline-block;
  text-align: center;
  -webkit-animation: glowing 1500ms infinite;
  -moz-animation: glowing 1500ms infinite;
  -o-animation: glowing 1500ms infinite;
  animation: glowing 1500ms infinite;
}
@-webkit-keyframes glowing {
  0% { background-color: #52832b; -webkit-box-shadow: 0 0 3px #52832b; }
  50% { background-color: #6eaf39; -webkit-box-shadow: 0 0 40px #6eaf39; }
  100% { background-color: #56892d; -webkit-box-shadow: 0 0 3px #52832b; }
}

@-moz-keyframes glowing {
  0% { background-color: #52832b; -moz-box-shadow: 0 0 3px #52832b; }
  50% { background-color: #6eaf39; -moz-box-shadow: 0 0 40px #6eaf39; }
  100% { background-color: #52832b; -moz-box-shadow: 0 0 3px #52832b; }
}

@-o-keyframes glowing {
  0% { background-color: #52832b; box-shadow: 0 0 3px #52832b; }
  50% { background-color: #6eaf39; box-shadow: 0 0 40px #6eaf39; }
  100% { background-color: #52832b; box-shadow: 0 0 3px #52832b; }
}

@keyframes glowing {
  0% { background-color: #52832b; box-shadow: 0 0 3px #52832b; }
  50% { background-color: #6eaf39; box-shadow: 0 0 150px #6eaf39; }
  100% { background-color: #52832b; box-shadow: 0 0 3px #52832b; }
}