I need help creating a simple RGB Controller in to installed in a vehicle: Description as Followed

A feed from headlight go into the controller - When Live controller turns on the BLUE(On)
A feed from Backup Light goes into the controller - When Live Turns Light GREEN(On)
A feed from Break go into the controller - When Live Turns Light RED(On) - OFF BLUE(Off) & GREEN(Off)

 

Welcome to AAC!

What supposed to happen for combinations of lights being on, e.g. backup and brake?

 

Welcome to AAC!

What supposed to happen for combinations of lights being on, e.g. backup and brake?

Only one light would be on at any one time:
A feed from headlight go into the controller - When Live controller turns on the BLUE(On) | GREEN(Off), RED(Off)
A feed from Backup Light goes into the controller - When Live Turns Light GREEN(On) | BLUE(Off), RED(Off)
A feed from Break go into the controller - When Live Turns Light RED(On) | OFF BLUE(Off), GREEN(Off)

 

Only one light would be on at any one time:
A feed from headlight go into the controller - When Live controller turns on the BLUE(On) | GREEN(Off), RED(Off)
A feed from Backup Light goes into the controller - When Live Turns Light GREEN(On) | BLUE(Off), RED(Off)
A feed from Break go into the controller - When Live Turns Light RED(On) | OFF BLUE(Off), GREEN(Off)

What has priority if there are multiple "feeds"?

 

What has priority if there are multiple "feeds"?

Priority Goes to the Brake : (RED(On) | OFF BLUE(Off), GREEN(Off))

Basically, I need two circuits:
ONE Circuit - When Headlight is on BLUE is lit when the Brake is pressed the circuit is broken and the power diverts to the RED
TWO Circuit - Divert Power from Circuit ONE which turns BLUE(Off) to power GREEN(On), when the Brake is pressed the circuit is broken and the power diverts to the RED.

 

Priority Goes to the Brake : (RED(On) | OFF BLUE(Off), GREEN(Off))

What about the other combination (headlight and backup)?


Show your solution so we can get an idea of what your solution space is. Switches only? Logic allowed? Microcontroller?

 

What about the other combination (headlight and backup)?
View attachment 158153

Show your solution so we can get an idea of what your solution space is. Switches only? Logic allowed? Microcontroller?

In that combination, priority would be given to the Green(Back-Up).

My only solution is to use 3 relay switch, but that configuration is primitive and clunky, I'll upload an illustration of my of what I did.
A simple circuit using transistors, resistors, diodes etc, would be ideal. I just don't know where to start.

 

I don't know why you want two circuits.

This is the logic for what you want: