HTML -seila.html
<form action="senha.php" method="post">
 <p>Senha:<input type="pass" name="senha"></p>
 <p><input type="submit"></p>
</form>


PHP - senha.php
<?php
ob_start();
$senha = 1052;
if ($$senha == $_POST['password']){
}
else{
echo "<script type='text/javascript'>);
location.href='seila.html';
</script>";
}
?>