/**
     * @param string $role
     *
     * @return array
     */
    public function findWithoutRole($role)
    {
        $qb = $this->_em->createQueryBuilder();
        $qb->select('u')
            ->from($this->_entityName, 'u')
            ->where('u.roles NOT LIKE :roles')
            ->setParameter('roles', '%"' . $role . '"%');
        return $qb->getQuery()->getResult();
    }

.block_container{
    display: flex;
    flex-flow: row wrap;
}
/*
[][]
[   ]
[][]
[   ]
*/
.block-1, .block-2{ order: 1}
.banner-1{ order: 2}
.block-3, .block-4{ order: 3}
.banner-2{ order: 4}
/*...*/

/*
[][][]
[     ]
[][][]
[     ]
*/
@media (min-width: 768px){
    .block-1, .block-2, .block-3{ order: 1}
    .banner-1{ order: 2}
    .block-4, .block-5, .block-6{ order: 3}
    .banner-2{ order: 4}
/*...*/
}
/*...*/