PLZ help_To get ‪Load Balancing‬ script for RouterBOAR 750G

Hello all

I want to add two Internet connection (2 WAN) in my server (RouterBOAR 750G)

This original Script I hope who can modify in this Script it will be Better for me
Port_1=wan1 192.168.2.1
Port_2=lan1 192.168.88.1
Port_3=wan2 192.168.1.1
Port_4=lan2 192.168.88.1
Port_5=lan3 192.168.88.1

#| ether1 is renamed ether1-gateway, rest of interfaces are switched
#| IP address 192.168.88.1/24 is on switch
#| DHCP client is on ether1-gateway
#| DHCP server is on switch, with address pool 192.168.88.10-192.168.88.254
#| masquerade on ether1-gateway
:global action

# these commands are executed after installation or configuration reset
:if ($action = "apply") do={
    /interface set ether1 name=ether1-gateway
    /interface set ether2 name=ether2-local-master
    /interface set ether3 name=ether3-local-slave
    /interface set ether4 name=ether4-local-slave
    /interface set ether5 name=ether5-local-slave

    /interface ethernet set ether3-local-slave master-port=ether2-local-master
    /interface ethernet set ether4-local-slave master-port=ether2-local-master
    /interface ethernet set ether5-local-slave master-port=ether2-local-master

    /ip address add address=192.168.88.1/24 interface=ether2-local-master comment="default configuration"

    :if ([:len [/system package find name="dhcp" !disabled]] != 0) do={
        /ip dhcp-client add interface=ether1-gateway disabled=no comment="default configuration";
        /ip pool add name=default-dhcp ranges=192.168.88.10-192.168.88.254;
        /ip dhcp-server add name=default address-pool=default-dhcp interface=ether2-local-master disabled=no;
        /ip dhcp-server network add address=192.168.88.0/24 gateway=192.168.88.1 dns-server=192.168.88.1 comment="default configuration";
    }

    /ip firewall {
    	filter add chain=input action=accept protocol=icmp comment="default configuration"
	filter add chain=input action=accept connection-state=established in-interface=ether1-gateway comment="default configuration"
	filter add chain=input action=accept connection-state=related in-interface=ether1-gateway comment="default configuration"
	filter add chain=input action=drop in-interface=ether1-gateway comment="default configuration"
        nat add chain=srcnat out-interface=ether1-gateway action=masquerade comment="default configuration"
    }

    /ip dns {
    	set allow-remote-requests=yes
    	static add name=router address=192.168.88.1
    }

    /tool mac-server remove [find]
    /tool mac-server add interface=ether2-local-master disabled=no
    /tool mac-server add interface=ether3-local-slave disabled=no
    /tool mac-server add interface=ether4-local-slave disabled=no
    /tool mac-server add interface=ether5-local-slave disabled=no

    /tool mac-server mac-winbox disable [find]
    /tool mac-server mac-winbox add interface=ether2-local-master disabled=no
    /tool mac-server mac-winbox add interface=ether3-local-slave disabled=no
    /tool mac-server mac-winbox add interface=ether4-local-slave disabled=no
    /tool mac-server mac-winbox add interface=ether5-local-slave disabled=no

    /ip neighbor discovery set [find name=ether1-gateway] discover=no
}

# these commands are executed if user requests to remove default configuration
:if ($action = "revert") do={
    /ip firewall {
        :local o [nat find comment="default configuration"]
        :if ([:len $o] != 0) do={ nat remove $o }

        :local o [filter find comment="default configuration"]
        :if ([:len $o] != 0) do={ filter remove $o }
    }

    :if ([:len [/system package find name="dhcp" !disabled]] != 0) do={
        :local o [/ip dhcp-server network find comment="default configuration"]
        :if ([:len $o] != 0) do={ /ip dhcp-server network remove $o }

        :local o [/ip dhcp-server find name="default" address-pool="default-dhcp" interface=ether2-local-master !disabled]
        :if ([:len $o] != 0) do={ /ip dhcp-server remove $o }

        /ip pool {
            :local o [find name=default-dhcp ranges=192.168.88.10-192.168.88.254]
            :if ([:len $o] != 0) do={ remove $o }
        }

        :local o [/ip dhcp-client find comment="default configuration"]
        :if ([:len $o] != 0) do={ /ip dhcp-client remove $o }
    }

    /ip dns {
    	set allow-remote-requests=no
        :local o [static find name=router address=192.168.88.1]
        :if ([:len $o] != 0) do={ static remove $o }
    }

    /ip address {
        :local o [find comment="default configuration"]
        :if ([:len $o] != 0) do={ remove $o }
    }

    /tool mac-server remove [find]
    /tool mac-server add interface=all disabled=no

    /tool mac-server mac-winbox remove [find interface!=all]
    /tool mac-server mac-winbox set [find] disabled=no 

    /ip neighbor discovery set [find name=ether1-gateway] discover=yes

    /interface ethernet set ether3-local-slave master-port=none
    /interface ethernet set ether4-local-slave master-port=none
    /interface ethernet set ether5-local-slave master-port=none

    /interface set ether1-gateway name=ether1
    /interface set ether2-local-master name=ether2
    /interface set ether3-local-slave name=ether3
    /interface set ether4-local-slave name=ether4
    /interface set ether5-local-slave name=ether5
}

I waiting for answer !!!

help help help