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<?php
add_action( 'wp_dashboard_setup', 'register_my_dashboard_widget' );

function register_my_dashboard_widget() {

	wp_add_dashboard_widget(

		'my_dashboard_widget',

		'My Dashboard Widget',

		'my_dashboard_widget_display'

	);

}

function my_dashboard_widget_display() {

    echo 'Put your instructions here';

}