Basic Linked Prim Colour Changing Help Needed

Hello,
Despite my best efforts I have failed to understand any of the previous posts regarding changing the colour of one object in a set of linked prims.

My problem is this. I have three prims that are linked together. Within those prims is a single script. I want to be able to change the colour of one of those three prims if a certain point is reached in the script. I only need to choose from two or three colours so no fancy 'choose what colour you want' routine is needed just a very basic 'Set Prim X to Colour Y'.

Can anybody help?

Thanks in advance.

Here's an example to set all sides of the second linked prim to red:

llSetLinkColor(2, <1.0, 0.0, 0.0>, ALL_SIDES);

About llSetLinkColor:

About links:
About colours:
About sides:

I recommend the NCI Scripting class on Object Communication. They include several examples of color-changing scripts using the llMessageLinked commands, which another way to do this.

Many thanks to you both.

Pale - This is what I needed, thanks. It works perfectly.

Galena - I look into these this week. Thanks for the pointer.