speed radar?

this is anoying me a bit im not sure if i got it right but i can tell something is way off i cant figure it out, it adds the name but only the last person

list visitor_list;
default
{
    state_entry()
    {
        llListen(-476, "","speedtrap", "");
    }
      
    on_rez(integer param)
    {
        llResetScript();
    }            
    listen( integer channel, string name, key id, string message )
    {
        string detected_name = message;
        {
            visitor_list += detected_name;
        }
    }
    touch_start(integer touchy)
    {
        llSetText(llList2String(visitor_list, 0),<1,1,1>,1);
    }
}

...GTA4 is cool.

Could your problem arise from the fact that you add names to the end of the list but always look at the first element?
Try this:

    touch_start(integer touchy)
    {
        llSetText(llList2String(visitor_list, llGetListLength( visitor_list )-1),<1,1,1>,1);
    }

( not compiled, debugged or tested )

dosent work but it compiles

What does not work? What is your problem? What are you trying to achieve?

a list of names that come threw on that channel, but it only shows the last name that came threw and none of the other ones before it

Of course not. You only ask for one element in the list for your llSetText.
Try this:

list visitor_list;
default
{
    state_entry()
    {
        llListen(-476, "","speedtrap", "");
    }
      
    on_rez(integer param)
    {
        llResetScript();
    }            
    listen( integer channel, string name, key id, string message )
    {
        string detected_name = message;
        {
            visitor_list += detected_name;
        }
    }
    touch_start(integer touchy)
    {
        llSetText(llDumpList2String( visitor_list, "\n" ),<1,1,1>,1);
    }
}

This will display all elements
I don't know how long a string you can have in a floating text, thats for you to find out.

works