void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {

  if ((digitalRead(2) == LOW) != (digitalRead(3) == LOW)) {
    digitalWrite(4, HIGH);
  }
  digitalWrite(4, LOW);

  if (digitalRead(2) == LOW && digitalRead(3) == LOW) {
    digitalWrite(5, HIGH);
  }
  digitalWrite(5, LOW);
}