Untitled

<!DOCTYPE html>
<html>
  <head>
    <title>Ikä</title>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
  </head>
  <body>
    <form action="" method="post">
      Teksti: <input type="text" name="input"> <br />
      Monta kertaa pärisee ;D: <input type="text" name="amount"> <br />
      <input type="submit" value="Lähetä">
    </form>

<?php
for($o = 0; $o < $_POST['amount']; $o++) {
	for($i = 0; $i < strlen($_POST['input']); $i++) {
		if ($i % 2 == 0)
			print '<span style="color:red">' . $_POST['input'][$i] . '</span>';
		else
			print '<span style="color:blue">' . $_POST['input'][$i] . '</span>';
	}
}
?>
</body>
</html>