<?php
$wp_customize->add_panel('frontpage', 
	    array(
            'title' => __('Theme Options', 'atlantaa'),        
      			'description' => '',                                        
      			'priority' => 3,
		)
	);

	$wp_customize->add_section('atlantaa_preloader', 
        array(
            'title'       => __('Preloader Section', 'atlantaa'),
            'description' => '',
            'panel'       => '',
            'priority'   => 50
        )
    );
   
    $wp_customize->add_setting('show_preloader',array(
            'default' => true,
            'sanitize_callback' => 'atlantaa_customizer_sanitize_checkbox',
            'capability' => 'edit_theme_options',
    ));  

    $wp_customize->add_control( 'show_preloader', array(
           'settings' => 'show_preloader',
           'section'   => 'atlantaa_preloader',
           'label'     => __('Uncheck To Hide Preloader','atlantaa'),
           'type'      => 'checkbox'
     ));