Reverse Lights For Truck

[c.schulz]

Hey Guys, Im looking to hook up extra reverse lights for my fullsize truck and I need some help with the wiring.Wanting to have extra lights but working with a 3 postion switch(on-off-on).
First postion will be triggered by factory reverse lights,
Sec. will be off and third will be constant on.
Ive got all the wiring and relay and switch just having trouble figuring out how to wire. I'd also like to wire in a indicator light to show when lights are on in the 2 positions. Call me an idiot but this is my first time wiring a relay.


Thanks in advance,
Chris