// Relay.ino
//
// 6 Febrary 2022, Version 1, by Koepel, Public Domain
//
// Using a relay to turn on one of two leds.
//

const int relayPin = 13;

void setup() 
{
  pinMode( relayPin, OUTPUT);
}

void loop() 
{
  digitalWrite( relayPin, HIGH);
  delay( 600);
  digitalWrite( relayPin, LOW);
  delay( 600);
}