add sections to the wordpress customize panel

gistfile1.txt

<?php

require_once( ABSPATH . WPINC . '/class-wp-customize-setting.php' );
require_once( ABSPATH . WPINC . '/class-wp-customize-section.php' );
require_once( ABSPATH . WPINC . '/class-wp-customize-control.php' );

class WP_Customize_Palette_Control extends WP_Customize_Image_Control {  
        public $type    = 'palette';
        public $removed = '';
        public $context;

        public function enqueue() {
                //wp_enqueue_script( 'wp-plupload' );
        }

        public function to_json() {
                parent::to_json();

                $this->json['removed'] = $this->removed;

                if ( $this->context )
                        $this->json['context'] = $this->context;
        }

        public function render_content() {
                ?>
                <label>
                        <span class="customize-control-title"><?php echo esc_html( $this->label ); ?></span>
                        <div>
                                <a href="#" class="button-secondary upload"><?php _e( 'Upload' ); ?></a>
                                <a href="#" class="remove"><?php _e( 'Remove' ); ?></a>
                        </div>
                </label>
                <?php
        }
}

//new WP_Customize_Palette_Control();


//add_action('customize_controls_init', 'WP_Customize_Palette_Control');

// add an option to the customize panel

function sci_customize_controls_init($wp_customize) {
	$wp_customize->add_section( 'themename_color_scheme', array(
		'title'          => __( 'Color Scheme', 'themename' ),
		'priority'       => 35,
	) );

	$wp_customize->add_setting( 'themename_theme_options[color_scheme]', array(
	'default'        => 'some-default-value',
	'type'           => 'option',
	'capability'     => 'edit_theme_options',
) );


$wp_customize->add_control( 'themename_color_scheme', array(
	'label'      => __( 'Color Scheme', 'themename' ),
	'section'    => 'themename_color_scheme',
	'settings'   => 'themename_theme_options[color_scheme]',
	'type'       => 'palette',
	'choices'    => array(
		'value1' => 'Choice 1',
		'value2' => 'Choice 2',
		'value3' => 'Choice 3',
		),
) );

}

add_action( 'customize_register', 'sci_customize_controls_init' );