int pinled1=13;
int pinled2=12;
int buzzerPin = 9;

void setup() {
  pinMode(pinled1, OUTPUT);
  pinMode(pinled2, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  blinktone(HIGH, LOW, 1000);
  blinktone(LOW, HIGH, 500);
}
 void blinktone(bool x, bool y, int z){
  digitalWrite(pinled1, x);
  digitalWrite(pinled2, y);
  tone(buzzerPin, z);
  delay(200);
 }