need help code pagination on front-page

i need to help coding function pagination on front-page. i setting homepage and my query is

if(is_front_page()) {
$paged = (get_query_var(‘page’)) ? get_query_var(‘page’) : 1;
}else {
$paged = (get_query_var(‘paged’)) ? get_query_var(‘paged’) : 1;
}

$query = new WP_Query(array(
‘post_type’ => ‘post’,
‘posts_per_page’ => 36,
‘category_name’ => $cat_slug[3],
‘paged’ => $paged
));

but plugin is not showing. how i can do?