llSetColor + llListen need help

Hi, I am have a little problem I am trying to change the color of a prim using a HUD but I cant made that the listen prim work and I dunno why and when I try look using
llListen(20,"",NULL_Key,""; others w/ the same HUD can change the color of the prim, and when i try using llListen(20,"",llGetOwner(),""; dont work I dont know how to make this work I try using
default
{
state_entry()
{
llListen(20,"",llGetOwner(),"";
}

listen(integer channel, string name, key id, string message)
{
if ( llGetOwner() == llGetOwnerKey( id ));

}
}

this but same problem other can change the color to, plus I dont know how to do that script get different messange for set different colors can someone help w/ this problem I'll be realy thankfull for any help.

default
{
    state_entry()
    {
        llListen( 10, "", llGetOwner(),"");
    }

    listen(integer channel, string name, key id, string message)
    {
        if ( message == "white" ) llSetColor( < 1.0, 1.0, 1.0 >, ALL_SIDES);
        if ( message == "red" ) llSetColor( < 1.0, 0.0, 0.0 >, ALL_SIDES);
        if ( message == "green" ) llSetColor( <0.0, 1.0, 0.0 >, ALL_SIDES);
        if ( message == "red" ) llSetColor( < 0.0, 0.0, 1.0 >, ALL_SIDES);
    }
}

This will work better if what you want is to listen on channel 10 for the owner.
I added the option of letting the owner ask for one of four colors

that look good but I trying to change the color of the prim using HUD, by touching a prim that send the messange like this

default
{

touch_start(integer total_number)
{

llSay(10,"red";
}
}

but when I try either of this happen all that use the same HUD can change the color of the prim or gent I try only to listen to the other the target prim listener dont work =\

X3 I did a mistake in this script is no llGetOwner is lie this

default
{
state_entry()
{
llListen(20,"",NULL_Key,"";
}

listen(integer channel, string name, key id, string message)
{
if ( llGetOwner() == llGetOwnerKey( id ));

}
}

NULL_KEY needs to be in all caps

You are also speaking on channel 10 and listening on channel 20

default {
	state_entry() {
		llListen(10, "", NULL_KEY, "");
	}

	listen(integer channel, string name, key id, string message) {
		if (llGetOwnerKey(id) == llGetOwner())
			if (message == "red")
				llSetColor(<1.0, 0.0, 0.0 >, ALL_SIDES);
	}
}

OK made the corrections and look like this:

HUD Prim
default
{
state_entry()
{

}

touch_start(integer total_number)
{
llSay(20, "red"; //or any color messange
}
}

Target Prim
default
{
state_entry()
{
llListen(20,"",NULL_KEY,"";
}

listen(integer channel, string name, key id, string message)
{
if ( llGetOwner() == llGetOwnerKey( id ));
if (message == "black" llSetColor(<0,0,0>, ALL_SIDES);
if (message == "red" llSetColor(<1,0,0>, ALL_SIDES);
if (message == "yellow" llSetColor(<1,1,0>, ALL_SIDES);
if (message == "green" llSetColor(<0,1,0>, ALL_SIDES);
}
}

that work but still I have the same problem I test this w/ others persons that are no the owners and still can change the color of the Target Prim, I dont know how to make that listen only listen the owner and filter other owners that have the same HUD Prim.

you need to use brackets in the if statement, and i'm not sure if it's required, but also else if. test to make sure it compiles, but that should work

=D Hey Thx a lot now it works just great, ^^ thx for the help