float TIMER_PERIOD = 2.0;
float ANGULAR_SPEED = 6.0;

changeRotation()
{
    float x = llFrand(1.0);
    float y = llFrand(1.0);
    float z = llFrand(1.0);
    llTargetOmega(<x,y,z>, ANGULAR_SPEED, 0.1);
}

default
{
    state_entry()
    {
        llSetTimerEvent(TIMER_PERIOD);
    }

    timer()
    {
        changeRotation();
    }
}