#define PINES_TOTAL 4

int pines[PINES_TOTAL] = {23, 22, 4, 2};

void setup() {
  for (int pin = 0; pin < PINES_TOTAL; pin++) {
    pinMode(pines[pin],OUTPUT);
  }
}

void loop() {
  for (int pin = 0; pin < 4; pin++) {
    digitalWrite(pines[pin],HIGH);
    delay(1000);
    digitalWrite(pines[pin],LOW);
    delay(1000);
  }
}