Interchanging tail lights when signaling?

For some reason, no matter how much I read about relays I still cant seem to get the concept of it!

Alright, well here's my request: I own a 2001 Eclipse. For the tail lights, there are 3 circles on each tail light. One is a reflector, one is the brake light, and the other is a turn signal. Now when you apply the brakes and signal, the brakes turn on with the middle circle, while the turn signal blinks. Of course the reflector is just a reflector so that stays the same. What I want my tail lights to do instead of what I just stated above, is... Lets say Im signaling left (You are behind me). On my left tail light assembly, I want the brake light, and the turn signal light to interchange blinks while I signal. While my right tail light assembly stays all solid. I hope I explained this thoroughly enough, but please dont hesitate to post if you have any questions. TIA!

So when the breaks are on no blink and when the blinker is on alternate between blinker and break.

Make one of these for each side.

This is true. That is just as requested in the post.

"Now when you apply the brakes and signal, the brakes turn on with the middle circle, while the turn signal blinks. Of course the reflector is just a reflector so that stays the same. What I want my tail lights to do instead of what I just stated above, is... Lets say Im signaling left (You are behind me). On my left tail light assembly, I want the brake light, and the turn signal light to interchange blinks while I signal. While my right tail light assembly stays all solid."

Tell me how you want it to act. The more you add the more complicated it gets.

If you add a hot wire to 87 it will blink Alternately unless the break is on, then it will not blink because there is a hot on both 87 and 87a.

Here is a way you could do it with 2 relays on each side. But they will blink in tandum instead of alternating.

What is the curcuit required, such that when the blinker is actuated, that the rear blinker and brake lite will alternate between each other when the brakes are applied and also when the brakes are released? 

If the 4 way flasher happens to be actuated at the same time, will that cause a problem?

These Diagrams take time to figure out.

Let me work on it awhile. The 4 way blinker just hit me in the head with a big curve Ball and I am trying to get back on my feet.

Now I have a headache.

Thanks for all the help. Sorry if I didnt explain enough. I'll try again but more elaborately:

Ok, if Im signaling withOUT having the brakes pressed down, I want one set of my tail lights to be all OFF while the other set of tail lights has a set of alternating lights. <This would be during the day, with my parking lights and headlights off - If it was night time, while I was signaling, withOUT pressing the brakes, Id want one set of alternating lights (The left set if Im signaling left), while the right side still has light, but not as if I had the brakes down.

Now if Im signaling WITH the brakes down, I want one set of my tail lights to be ALL ON. white the other set of lights alternate. <This would be day or night

Hope this helps =) Oh maglin, the reason being is because... I think its pretty cool, and Im pretty sure its illegal, but its a modification that I came up with, that I havent seen done on a car like mines, and I think it would be pretty cool =P Almost anything you do to your car is illegal. Especially where I live ;)

Um ok? Thats not what Im trying to get accomplished.