//I modified the main loop to check, that it's ok to play the song

void loop(){

  // if the sensor is calibrated
  if ( calibrated() ){
    if ( trigOK() )
      {
        // get the data from the sensor
      readTheSensor();

      // report it out, if the state has changed
      reportTheData();
      }
  }
}
// The bool trigOK returns TRUE if, the time is between 7-11AM &
// the motion was never detected, or detected more than 3600 seconds ago.

bool trigOK() {
  if (Time.hour()>=7 & Time.hour()<=11){
    if (trigT==0) {
    return cantrig;
    } else if (trigT >= ( Time.now() -3600 )){
    cantrig = FALSE;
    return cantrig;
    } else {
    cantrig = TRUE;
    return cantrig;
    }
  } else {
    cantrig= FALSE;
    return cantrig;
  }
}

// Within the motion detected function, I added the ability to record trigT

  if (pirState == LOW) {
      // we have just turned on
      Particle.publish("designingiot/s15/motion");
      Particle.publish("song");
      trigT = Time.now();
      // Update the current state
      pirState = HIGH;
      setLED( pirState );
    }