/*
  Blink

  Turns an LED on for one second, then off for one second, repeatedly.

  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
  the correct LED pin independent of which board is used.
  If you want to know what pin the on-board LED is connected to on your Arduino
  model, check the Technical Specs of your board at:
  https://www.arduino.cc/en/Main/Products



  This example code is in the public domain.

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
*/

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(13, OUTPUT); // rojo
  pinMode(12, OUTPUT); // amarillo
  pinMode(11, OUTPUT); // verde
}

// este es un programa que endciende un led
void loop() {
  digitalWrite(13, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // retardo de 1000ms o 1 seg
  digitalWrite(13, LOW);   // apagado led
  delay(1000);                      // retardo de 1000ms o 1 segundo

  digitalWrite(12, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // retardo de 1000ms o 1 seg
  digitalWrite(12, LOW);   // apagado led
  delay(1000);   

  digitalWrite(11, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // retardo de 1000ms o 1 seg
  digitalWrite(11, LOW);   // apagado led
  delay(1000);   
}