Configure VLANS on HP 1930 Switch

We currently own a /22 block of live IPs. Listed below is an example of what we own - not actual IPs - just an example -

1.1.2.0
1.1.3.0
1.1.4.0
1.1.5.0

For this description of the work, I am using the IP of 2.1.0.1 as the IP for our Internet provider.

The Main Firewall config - not the actual IPs - just an example - that the other Firewalls below would connect to is -

Lan IP 1.1.5.1
WAN 2.1.0.1
WAN Gateway 2.1.0.250

I am looking for someone to configure an HP 1930 48 port switch that other firewalls will be connected to. For this example, the setup would be similar to this.
Firewall 1 IP 1.1.5.2
Firewall 2 IP 1.1.5.3
Firewall 3 IP 1.1.5.4
Firewall 4 IP 1.1.5.5
Firewall 5 IP 1.1.5.6
Firewall 6 IP 1.1.5.7
Firewall 7 IP 1.1.5.8
Firewall 8 IP 1.1.5.9
GW 1.1.5.1
Subnet 255.255.252.0

I want VLANS configured so each firewall can't see or talk to the other ones.