How do I use autoscaling effectively with DNS?

        // Example of implementing autoscaling with DNS
        $dnsClient = new DnsClient();
        
        // Check current server load
        $currentLoad = getServerLoad();
        
        // Define load threshold
        $loadThreshold = 75; // in percentage
        
        // Autoscale logic
        if ($currentLoad > $loadThreshold) {
            // Add a new instance
            $newInstance = addServerInstance();
            echo "New instance added: " . $newInstance->id;

            // Update DNS records
            $dnsClient->addRecord("myapp.example.com", $newInstance->ipAddress);
        } else {
            // Remove instance if the load is below threshold
            $instanceToRemove = getIdleInstance();
            if ($instanceToRemove) {
                removeServerInstance($instanceToRemove);
                $dnsClient->removeRecord("myapp.example.com", $instanceToRemove->ipAddress);
                echo "Removed instance: " . $instanceToRemove->id;
            }
        }