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<html>
  <head>
    <meta charset="UTF-8" />
    <title>Bier zählen</title>
  </head>
  <body>
    <?php

      $x = rand(1, 99);
      echo "Start: ".$x;
      $count = 0;

      while ($x != 1) {
        if ($x % 2 == 0) {
          $x = $x / 2;
        } else {
          $x = 3 * $x + 1;
        };
        $count = $count + 1;
      }

      echo "<br><br>Schritte: ".$count;
      echo "<br><br>Ende: ".$x;     

    ?>
  </body>
</html>