<div class="loader">
  <span></span>
  <span></span>
  <span></span>
</div>

body {
      margin: 0;
    }

    .loader {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 10px;
      height: 100vh;
      background-color: #0d1117;
    }

    .loader span {
      width: 15px;
      height: 15px;
      background-color: #4ade80;
      border-radius: 50%;
      animation: bounce 0.6s infinite alternate;
    }

    .loader span:nth-child(2) {
      animation-delay: 0.2s;
    }
    .loader span:nth-child(3) {
      animation-delay: 0.4s;
    }

    @keyframes bounce {
      to {
        transform: translateY(-15px);
        opacity: 0.5;
      }
    }