Wordpress Admin tester

add_action( 'admin_menu', 'my_tester_menu' );


function my_tester_menu() 
{
	add_menu_page( 'Tester Options', 'Tester', 'edit_others_pages', 'tester', 'my_tester_options', null, '4.5' );

        add_submenu_page( 'tester', 'Tester sub 1', 'Tester sub 1', 'edit_others_pages', 'testers', 'testCodeFunction1');
	add_submenu_page( 'tester', 'Tester sub 2', 'Tester sub 2', 'edit_others_pages', 'testers', 'testCodeFunction2');
}

function my_tester_options() 
{
	echo '<div class="wrap">';
	echo '<br/><br/><br/><br/><b>Testing stuff.</b><br/><br/>';
	echo 'Testing paragraph';
	echo '</div>';
}

function testCodeFunction1()
{
//do something here
}

function testCodeFunction2()
{
//do something here
}

Populate Wordpress admin area with custom testing function. Output from function is displayed on the right side of WP