One object interacting with another object

I'd to know how to set this up and what LSL functions I need to use.

I have two box prims sitting in front me. I'd like to touch one and have the second one, say, turn red. The objects cannot be links.

How do I do this?

You need to use a listen event in the reactionary prim such as
llListen (-9999, "", "control box", "";

where -9999 is the channel that the box will be listening on, and control box is the name of the box you're going to be touching. That way, the listening box will only be listening for chat from the box you're touching, then in the control box, in a touch_start() event, do an llSay() on channel -9999 like so

llSay (-9999, "red";

Back to the receiver box.. you need to have a listen event to process chat heard from the controller box.

listen (integer channel, string name, key id, string message)
{
     if (message == "red")
     {
          llSetColor (1,0,0);
     }
}

and that should do it.

http://www.secondscripter.com

put a script in the first one that uses the llSay() comand. make it say a command ("turn_red" on a specific chat chnnel -- example: llSay(-33,"turn_red";

in the second cube use the llListen command and the listen event to listen on channel -33

when the second cube hears the turn red command, use th llSetColor command to turn it red.

depending on how far away the object is, you may want to use llWhisper, llShout or llRegionSay

Your help gave me additional ideas. Thank you again

I've been trying to figure out how all this works - very helpful!

This has been incredibly useful in helping me understand how these things work, but when I go to implement the script, I keep getting a syntax error with the "listen(" line. Any ideas why/suggestions of how to fix it? I was on a real roll (feeling like I actually understand a thing or two) and now I'm stuck.