//------------------------------------------------------------
//--- Simple example: Arduino sending data to serial port ----
//  (-View output using Serial Monitor in Arduino Interface.)
//------------------------------------------------------------

void setup() {              // Only do once at startup       
  Serial.begin(9600);       // start serial port at 9600 bps:
}
void loop()  {              // repeat forever  
    Serial.println("0");    // Send message to serial (USB)
    delay(500);             // delay a half second
    Serial.println("1");    // Send message to serial (USB)
    delay(500);             // delay a half second
}