Код IT Загрузка примера кода…

HTML main.html 
<!DOCTYPE html>
<html lang="ru">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Точки загрузки</title>
  <style>
    body {
      margin: 0;
      min-height: 100dvh;
      display: grid;
      place-items: center;
      font-family: system-ui, sans-serif;
    }
    .dots {
      display: flex;
      gap: 0.4rem;
    }
    .dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #6366f1;
      animation: bounce 0.6s ease-in-out infinite;
    }
    .dots span:nth-child(2) { animation-delay: 0.15s; }
    .dots span:nth-child(3) { animation-delay: 0.3s; }
    @keyframes bounce {
      0%, 80%, 100% { transform: translateY(0); }
      40%           { transform: translateY(-10px); }
    }
  </style>
</head>
<body>
  <div class="dots" aria-hidden="true">
    <span></span><span></span><span></span>
  </div>
</body>
</html>
<!DOCTYPE html>
<html lang="ru">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Точки загрузки</title>
  <style>
    body {
      margin: 0;
      min-height: 100dvh;
      display: grid;
      place-items: center;
      font-family: system-ui, sans-serif;
    }
    .dots {
      display: flex;
      gap: 0.4rem;
    }
    .dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #6366f1;
      animation: bounce 0.6s ease-in-out infinite;
    }
    .dots span:nth-child(2) { animation-delay: 0.15s; }
    .dots span:nth-child(3) { animation-delay: 0.3s; }
    @keyframes bounce {
      0%, 80%, 100% { transform: translateY(0); }
      40%           { transform: translateY(-10px); }
    }
  </style>
</head>
<body>
  <div class="dots" aria-hidden="true">
    <span></span><span></span><span></span>
  </div>
</body>
</html>