Change Shell Script and IPK in OpenWRT on Marvell

We are using a custom OpenWRT GUI to manage some network settings. We need to change some routing in the back end. the router has 7 internet connections. Script pings internet on connection 1 and if no answer, it failover to connection 2 Script pings internet on connection 2, if no answer, it goes to connection 3, and so on for connection 4-5-6-7. If connection 1 becomes available again, internet is sent back via the Previous Active connection. Traffic is then NAT`d and sent to and from the regular LAN 1. Modify Shell Script so that when WAN4 becomes Active, WAN6 becomes active at the same time. Modify Shell Script so that when WAN5 becomes Active, WAN 7 becomes active at the same time. WAN 6 and 7 route via NAT to LAN2. The selection of the WANs and Failover stays the same as WAN 1-2-3. It's just that now WAN 6 will become active at the same time as WAN 4. And WAN 7 will be active at the same time as WAN 5. Since everything exists already, It should be just a quick adjustment to change the script to change the routes as requested.