With AWS LoadBalancer how to set "Service down for maintenance"?

How can I set a message Service down for maintenance or Service Temporarily Unavailable on my web service that runs on Amazon Web Services using LoadBalancer.

I have a few Loadbalancers and now I need to put one down.

I'm using laravel and I can set a single instance by

php artisan down

but I have many instances.

And I'm not using Route53 on this LoadBalancer.

via Chebli Mohamed