const int pins[] = { 0, 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 };
void setup() {
  // parametros de for
  //inicializacion, declarar limite, declarar avance
  //i++ = (i= i + 1)
for( int i = 0 ; i < 10; i++){
  pinMode(pins[i], OUTPUT);
  }
}

int counter = 0;
void loop() {
  for (int i=0; i<10; i++){
    digitalWrite(pins[i],bitRead(counter, i) ? HIGH : LOW);
  }
  counter++;
  if(counter == 5)
    counter = 0;
  delay(1000);

}