Route Vlan on multiple WAN

Hi guys, i has two WAN and four VLAN on my system. Now , i running load balancing pcc and fail over on RB3011UiAs. And i want to config VLAN 1,2 run on WAN 1, VLAN 3,4 run on WAN 2. How can i do that ? My’s code config load balancing and fail over :

/ip address 
#From router to switch
add address=10.0.6.2/29 interface=ether6-master
#Two WAN
add address=192.168.1.2/24 interface=ether1
add address=192.168.0.2/24 interface=ether3

/ip firewall mangle

add chain=input in-interface=ether1 action=mark-connection new-connection-mark=ether1_conn
add chain=input in-interface=ether3 action=mark-connection new-connection-mark=ether3_conn

add chain=output connection-mark=ether1_conn action=mark-routing new-routing-mark=to_ether1 
add chain=output connection-mark=ether3_conn action=mark-routing new-routing-mark=to_ether3

add chain=prerouting dst-address=192.168.0.0/24 action=accept in-interface=ether6-master
add chain=prerouting dst-address=192.168.1.0/24 action=accept in-interface=ether6-master

add chain=prerouting dst-address-type=!local in-interface=ether6-master per-connection-classifier=both-addresses-and-ports:2/0 action=mark-connection new-connection-mark=ether1_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=ether6-master per-connection-classifier=both-addresses-and-ports:2/1 action=mark-connection new-connection-mark=ether3_conn passthrough=yes

add chain=prerouting connection-mark=ether1_conn in-interface=ether6-master action=mark-routing new-routing-mark=to_ether1
add chain=prerouting connection-mark=ether3_conn in-interface=ether6-master action=mark-routing new-routing-mark=to_ether3

/ip route

add dst-address=0.0.0.0/0 gateway=192.168.1.1 routing-mark=to_ether1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.0.1 routing-mark=to_ether3 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.1.1 distance=1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.0.1 distance=2 check-gateway=ping

/ip firewall nat

add chain=srcnat out-interface=ether1 action=masquerade
add chain=srcnat out-interface=ether3 action=masquerade