Get category & count from theme options

<?php
    //set posts category from theme option
    $YOUR_CATEGORY_IDENTITY = get_option('of_YOUR_CATEGORY_IDENTITY');
    //store value from theme option
    $NUM_VAL = get_option('of_$NUM_VAL');
    query_posts('category_name='.$YOUR_CATEGORY_IDENTITY.'&posts_per_page='.$NUM_VAL.'');
    while (have_posts()) : the_post();
?>
<!-- Add your content here -->
<?php endwhile;?>