truck lighting

Ok I have checked and searched and found the sidemarker light info on the forum, some come close to what I want but unsure.  

Equipment I have:  

2 - 12v dpdt, 4 - 12v spdt, plenty of wiring, 2 sets of sidemarker lights (set consists of 3 each for a total of six lights), These lights are single filament, one wire, ground is part of the equipment and are grounded when installed.

What I want: 

I want to allow the sidemarkers to flash on when Parking Light is not on, and flash when the parking light is on.

Issue: 

I cannot seem to isolate the main power for the turn signal as all locations I find on my power box or fuse box they all flash

I also when setting up the relay and the parking lights are on the sidemarker lights flash fast, basically the relay is just switching from one power source to the next. 

I am open to suggestions and please if you could post a diagram to assist me I would really appreciate it.

ok I have something maybe some people can work with, it is a layout of what I am looking at doing but not sure how to connect.  Any help would be appreciated.