/*
  Blink
 From "Arduino IDE EXAMPLES - BASICS - BLINK". then slightly modified to choose correct output 
 ports for our 3 LEDs and make them blink in sequence.
  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

  modified 8 May 2014
  by Scott Fitzgerald
  modified 2 Sep 2016
  by Arturo Guadalupi
  modified 8 Sep 2016
  by Colby Newman
  modified 17 July 2024
  by James Khan

  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 pins 26, 0, and 1 as an output.
  pinMode(26, OUTPUT);
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(26, HIGH);  // turn the LED 1 on (HIGH is the voltage level)
  delay(500);                      // wait for half second
  digitalWrite(0, HIGH);  // turn the LED 2 on (HIGH is the voltage level)
  delay(500);                      // wait for half a second
  digitalWrite(1, HIGH);  // turn the LED 3 on (HIGH is the voltage level)
  delay(500);                      // wait for half second

  digitalWrite(26, LOW);   // turn the LED 1 off by making the voltage LOW
  delay(500);                      // wait for a half second
  digitalWrite(0, LOW);   // turn the LED 2 off by making the voltage LOW
  delay(500);                      // wait for a half second
  digitalWrite(1, LOW);   // turn the LED 3 off by making the voltage LOW
  delay(500);                      // wait for a half second
}