int chaquetas[] = {2, 4, 5, 18, 19};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  for (int i= 0; i<5; i++){
    pinMode(chaquetas[i], OUTPUT);
  }
}


void loop() {
  // put your main code here, to run repeatedly:

  for (int i= 0; i<5; i++){
    digitalWrite(chaquetas[i], HIGH);
    delay(10);
    digitalWrite(chaquetas[i], LOW);
    delay(20);
  }  
}