const int pinoLedInicial = 8;
const int pinoLedFinal = 13;

void setup() {
  int pino;
  for (pino=pinoLedInicial; pino<=pinoLedFinal; pino++) {
    pinMode(pino, OUTPUT);
  }
}


void loop() {
  int pino;
  for (pino=pinoLedInicial; pino<=pinoLedFinal; pino++) {
    digitalWrite(pino, HIGH);
    delay(500);
    digitalWrite(pino, LOW);
    delay(500);
  }
}