void setup() {
  // put your setup code here, to run once:
pinMode(6, OUTPUT);
//ponemos output porque estamos sacando energia del pin numero 2
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);

}

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

digitalWrite(6, HIGH); //se abre la led
delay(500); //estamos haciendo que la led este abierta medio segundo
digitalWrite(6, LOW); //se cierra la led
delay(500);

digitalWrite(5, HIGH); //
delay(500); 
digitalWrite(5, LOW); 
delay(500);

digitalWrite(4, HIGH); //
delay(500); 
digitalWrite(4, LOW); 
delay(500);

digitalWrite(3, HIGH); //
delay(500); 
digitalWrite(3, LOW); 
delay(500);

digitalWrite(2, HIGH); //
delay(500); 
digitalWrite(2, LOW); 
delay(500);


}