Pac Man style ProgressBar in Symfony command

PacManCommand.php

<?php
namespace AppBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class PacManCommand extends ContainerAwareCommand
{
    const COMMAND_NAME = 'app:pacman';

    /**
     * {@inheritdoc}
     */
    protected function configure()
    {
        $this
            ->setName(self::COMMAND_NAME)
            ->setDescription('Eat all pac-dots')
        ;
    }

    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $progress = new ProgressBar($output, 10);
        $progress->setProgressCharacter('ᗧ');
        $progress->setEmptyBarCharacter('·');
        $progress->start();
        // ...
    }
}

php bin/console app:pacman
 0/10 [ᗧ···························]   0%