Animation Button

POST BOX

<div class="animated-border">
    <button class="btn" href="https://wa.me/91999999999">LIVE PREVIEW </button>
  </div>
  

CSS PASTE

  .animated-border {
  width: 300px;
  height: 70px;
  box-shadow: 0 4px 40px -16px rgba(0, 0, 0, 0.2);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}

.animated-border .btn {
  width: 95%;
  height: 86%;
  background: #fff;
  border-radius: 24px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  font-family: "Roboto Black", sans-serif;
  font-size: 24px;
  border: none;
}

.animated-border::after {
  content: "";
  height: 500px;
  width: 500px;
  position: absolute;
  background: conic-gradient(red, yellow, blue, red);
  z-index: -1;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotateZ(0deg);
  animation: spin 8s infinite linear;
}

@keyframes spin {
  100% {
    transform: translate(-50%, -50%) rotateZ(360deg);
  }
}