Include theme css and js with functions in wordpress

// Begin Include theme css and js function
function add_theme_css_js(){

	// Include css
	wp_register_style( 'foonts', 'https://fonts.googleapis.com/css?family=Montserrat:400,500,600,700', array(), '1.0', 'all' );
	wp_register_style( 'flexslider', get_template_directory_uri() . '/css/flexslider.css', array(), '2.0', 'all' );
	wp_register_style( 'stylesheet', get_template_directory_uri() . '/css/style.css', array(), '1.0', 'all' );

	wp_enqueue_style('foonts');
	wp_enqueue_style('flexslider');
	wp_enqueue_style('stylesheet');

	// Include js
	wp_enqueue_script( "jquery");
	wp_enqueue_script( "flexslider-js", get_template_directory_uri()."/scripts/jquery.flexslider.js", array('jquery'), '2.0', false );
	wp_enqueue_script( "common-scripts", get_template_directory_uri()."/scripts/common-scripts.js", array('jquery'), '1.0', false );
}

add_action( 'wp_enqueue_scripts', 'add_theme_css_js' );