/*
 * Lesson 62: Time control without delay, LED blink with millis() | Arduino Step By Step Course
 /*
 * LED Blink with millis() with different time intervals of ON and OFF time
 * Written by Ahmad Shamshiri for Robojax.com and Robojax YouTube channel
 * written on August 5, 2019 in Ajax, Ontario, Canada at 12:41
 * Watch video instruction: https://youtu.be/obBX9hyH5mM
 
 This video is part of Arduino Step by Step Course which starts here: https://youtu.be/-6qSrDUA5a8

 
Get this code and other Arduino codes from Robojax.com

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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
const int LEDpin = 3;
const long onDuration = 100;// OFF time for LED
const long offDuration = 500;// ON time for LED
int LEDState =HIGH;// initial state of LED

long rememberTime=0;// this is used by the code

void setup() {
  pinMode(LEDpin,OUTPUT);// define LEDpin as output
  digitalWrite(LEDpin,LEDState);// set initial state
}

void loop() {
  // Robojax LED blink with millis()

 if( LEDState ==HIGH )
 {
    if( (millis()- rememberTime) >= onDuration){   
    LEDState = LOW;// change the state of LED
    rememberTime=millis();// remember Current millis() time
    }
 }
 else
 {   
    if( (millis()- rememberTime) >= offDuration){     
    LEDState =HIGH;// change the state of LED
    rememberTime=millis();// remember Current millis() time
    }
 }

 // Robojax LED blink with millis()
 digitalWrite(LEDpin,LEDState);// turn the LED ON or OFF

}// loop ends