/**
   BasicFlashingLed.ino
      by Matthew Ford,  2020/01/27
   (c)2019 Forward Computing and Control Pty. Ltd.
   NSW, Australia  www.forward.com.au
*/
// this sketch runs on Uno and most other Arduino boards
// it uses millisDelay from https://www.forward.com.au/pfod/ArduinoProgramming/TimingDelaysInArduino.html
// download and install the millisDelay library https://www.forward.com.au/pfod/ArduinoProgramming/millisDelay.zip
#include "millisDelay.h"

int ledPin = 13; // built in led on most boards
bool ledOn = false; // is the led on or off
millisDelay ledDelay;
unsigned long LED_DELAY_MS = 1000; // on/delay in mS == 1sec

void setup() {
  pinMode(ledPin, OUTPUT); // set output
  digitalWrite(ledPin, LOW); // turn led off
  ledDelay.start(LED_DELAY_MS); // start led flash delay
  ledOn = false; // start off
}

void loop() {
  if (ledDelay.justFinished()) {
    ledDelay.restart(); // restart it
    ledOn = !ledOn; // toggle ledOn
    if (ledOn) {
      digitalWrite(ledPin, HIGH); // turn on
    } else {
      digitalWrite(ledPin, LOW); // turn off
    }
  }
}