Hello, and how are you?

I'm trying (and very, very hard at that!) to change the colour of an object by picking up other objects, what are a certain colour.

For example:

If I was to pick up two red objects and a blue object I would want my object to be 2 parts red and 1 part blue.

Here is the script i'm using.

var red : float; 
var green : float; 
var blue : float; 
var purple : float;
var orange : float;

var playerColor : Material;

function Start () {

   playerColor = renderer.material;

}

function Update () {

   red = red + purple / 2 + orange /3;

   green = green + orange /3;

   blue = blue + purple / 2 + orange /3;

   playerColor.SetColor("_Tint", Color(red, green, blue));

}

function OnCollisionEnter (other : Collision) {

if (other.transform.tag == "Particle") {

   other.gameObject.SendMessage("SendParticle");

   Destroy (other.gameObject);

}

}

function AddBlue () {

   blue ++;

}

function AddRed () {

   red ++;

}

function AddOrange () {

   orange ++;

}

function AddPurple () {

   purple ++;

}

function AddGreen () {

   green ++;

}

So yeah... It doesn't work. Maybe a tip or two (something...anything..) on how colour works?

Thanks!