Simple Welcome Script Needed

//Greeter script
//by Padraig Stygian
//
//Range is in meters, alter to suit the size of your shop. 
//Rate is in seconds, and determines how often it will scan for visitors.
//I have not compiled this, and don't know if it works, 
//but it looks right, at a glance.
float rate = 1.0;
float range = 5.0;
integer j;

default
{
	state_entry()
	{
		llSensorRepeat( "", "", AGENT, range, TWO_PI, rate );
	}
	sensor(integer total_number)
    {
        for (j=0;j<total_number;j++)
        {
            llSay(0,"Hello, " + llDetectedName(j))
        }
    }
    
    on_rez(integer st)
	{
		llResetScript();
    }
}

default {
    state_entry() {
        llSay(0, "Hello, Avatar.  I am a lag monster.  RAWR.");
    }

    touch_start(integer total_number) {
        llSay(0, "Hello, Avatar.  I am a lag monster.  RAWR.");
    }
}