Object look at avatar - OpenSim

vector target;
float strength = 1.0;
float damping = .90;

vector AXIS_UP = <0,0,1>;
vector AXIS_LEFT = <0,1,0>;
vector AXIS_FWD = <1,0,0>;


rotation getRotToPointAxisAt(vector axis, vector target) {
    return llGetRot() * llRotBetween(axis * llGetRot(), target - (llGetPos() - <0,0,1>));
}

default
{
    state_entry()
    {
        llSetRot(ZERO_ROTATION);
        llSensorRepeat("",NULL_KEY,AGENT,65.0,PI,5.0);
    }

    sensor( integer det ) {
            integer st = (integer) llFrand((float)det);
            target = llDetectedPos(st);
            llSetRot(getRotToPointAxisAt(AXIS_FWD,target));
    }
}