function command( pres ) {
	return onCommand;

	/**
	* Jumps a specified number of slides.
	*
	* @private
	* @param {integer} n - number of slides to jump
	*/
	function onCommand( n ) {
		var err;
		if ( !isInteger( n ) ) {
			err = new TypeError( format( 'invalid argument. Must provide an integer. Value: `%s`.', n ) );
			debug( 'Error: %s', err.message );
			pres._repl._ostream.write( 'Error: '+err.message+'\n' );
			return;
		}
		pres._repl.once( 'drain', onDrain );

		/**
		* Callback invoked upon a `drain` event.
		*
		* @private
		*/
		function onDrain() {
			pres.jump( n ).show();
		}
	}
}
Returns a callback to be invoked upon calling the `jump` command.

@private
@param {Presentation} pres - presentation instance
@returns {Function} callback