int buzzer1 = 10 , buzzer2 = 11 , buzzer3 = 12 , state = 2 , led = 13 , rc;



void setup() {
  pinMode(state, INPUT);
  pinMode(led, OUTPUT);
  pinMode(buzzer1, OUTPUT);
  pinMode(buzzer2, OUTPUT);
  pinMode(buzzer3, OUTPUT);
}

void loop() {
   ppl();
}



void sonar() {
  digitalWrite(buzzer1 , HIGH);
  digitalWrite(buzzer2 , HIGH);
  digitalWrite(buzzer3 , HIGH);
  digitalWrite(led , LOW);
}

void nosonar() {
  digitalWrite(buzzer1 , LOW);
  digitalWrite(buzzer2 , LOW);
  digitalWrite(buzzer3 , LOW);
  digitalWrite(led , HIGH);
}

void ppl() {
  rc = digitalRead(2);
    if (rc == 0) {
    sonar();
  }
  else {
    nosonar();
  }
}