void setup() {
  // put your setup code here, to run once:

}

void loop() {
  while(digitalRead(2)==HIGH && digitalRead(3)==HIGH){
    noTone(6);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
  }
  while (digitalRead(2) ^ digitalRead(3)==HIGH){
    digitalWrite(5, LOW);
    digitalWrite(4, HIGH);
    tone(6,250);
    delay(2000);
    noTone(6);
    delay(2000);
  }
  while(digitalRead(2)==LOW && digitalRead(3)==LOW){
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    tone(6,250);
  }

}