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

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


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