.btn_anime
{
   background-color: #ffffff;
  -webkit-border-radius: 10px;
  border-radius: 10px;
  border: none;
  color: #FFFFFF;
  cursor: pointer;
  display: inline-block;
  font-family: Arial;
  font-size: 20px;
  padding: 5px 10px;
  text-align: center;
  text-decoration: none;
  -webkit-animation: glowing 1500ms infinite;
  -moz-animation: glowing 1500ms infinite;
  -o-animation: glowing 1500ms infinite;
  animation: glowing 1500ms infinite;
}
@-webkit-keyframes glowing {
 0% { color: #3ba5ff; background-color:#005297;  }
  50% { color: #005297; background-color:#ffffff; }
  100% { color: #3ba5ff; background-color:#005297; }
}

@-moz-keyframes glowing {
 0% { color: #3ba5ff; background-color:#005297;  }
  50% { color: #005297; background-color:#ffffff; }
  100% { color: #3ba5ff; background-color:#005297; }
}

@-o-keyframes glowing {
  0% { color: #3ba5ff; background-color:#005297;  }
  50% { color: #005297; background-color:#ffffff; }
  100% { color: #3ba5ff; background-color:#005297; }
}

@keyframes glowing {
  0% { color: #ffffff; background-color:#ff6a00; border-radius:15px;}
  50% { color: #005297; background-color:#ffffff; border-radius:15px; }
  100% { color: #ffffff; background-color:#ff6a00; border-radius:15px; }
}