integer follow = 0;  // this number will tell us whether to follow or not

default
{
    state_entry()
    {
        llSetStatus(STATUS_PHYSICS, TRUE);  // needed for llMMoveToTarget
        follow = 0;                                         // to start, don't follow
        llListen(0,"",llGetOwner(),"");                     // start listening to owner
        llSensorRepeat("",llGetOwner(),AGENT,200,2*PI,.5);  // NEW: start sensing your owner
    }

    sensor(integer total_number)
    {
        if (follow == 1)
        {
            llMoveToTarget(llDetectedPos(0)+<-1,0,-0.5>, .3);  // go a little over and down from owner
            llLookAt(llDetectedPos(0), .1 , 1);                // orients toward owner
        }
    }

    listen(integer channel, string name, key id, string message)
    {
       
        if (message == "come")
        {
            llSay(0,"I am coming, master");
            follow = 1;                                      //turn following on!
        }
        
        if (message == "stay")
        {
            llSay(0,"I will stay, master");
            follow = 0;                                     //turn following off
        }
        
    }
}