/*
 * Arduino Step by Step Course by Robojax
 * Lesson 98  https://robojax.com/course1/?vid=lecture98
 * Project 7 of 10
 * 

 * 4 LEDs walking light Arduino Project
 * This is an Arduino sketch where 4 LEDs turn ON and OFF in such a way
 * that an LED is walking

* Watch full details and demonstration: https://youtu.be/OSwleCBlkuI
 * 
 * Start a full Arduino Step By Step course:  https://youtu.be/-6qSrDUA5a8
 * 
 *  * LED = Light Emitting Diode
 * LED is pronounced (El EE Dee)
 ****** 10 Projects explained in this video
 * 1-LED ON OFF 
 * 2-LED ON/OFF with push button
 * 3-LED ON/OFF toggle with push button
 * 4-Fading light of LED
 * 5-Fading light of LED using push button
 * 6-See Saw with LED
 * 7-Walking Light
 * 8-Walking light with push button
 * 9-LED voltage level meter
 * 10- Arduino Traffic Light
 * 
 * Written by Ahmad Shamshiri on Feb 01, 2022 
 * This code can be obtained from Robojax.com
 * Code ID: WalkingLED
 This video is part of Arduino Step by Step Course which starts here: https://youtu.be/-6qSrDUA5a8

 * www.Robojax.com

If you found this tutorial helpful, please support me so I can continue creating 
content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax
  
 * 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 LED1 = 3;
const int LED2 = 4;
const int LED3 = 5;
const int LED4 = 6; 
const int LED5 = 7; 
int offTime = 30;//the time LED waits in OFF state
int onTime = 100;//the time LED is ON 

//the code inside setup() runs once.

void setup() {
  pinMode(LED1, OUTPUT);//set pin of Arduino as output
  pinMode(LED2, OUTPUT);//set pin of Arduino as output
  pinMode(LED3, OUTPUT);//set pin of Arduino as output
  pinMode(LED4, OUTPUT);//set pin of Arduino as output
  pinMode(LED5, OUTPUT);//set pin of Arduino as output  
}//setup end

void loop() {
  
  digitalWrite(LED1, HIGH);//set pin 2 to HIGH 
  delay(onTime);    //wait for the onTime seconds (see top of this code)                   
  digitalWrite(LED1, LOW); // Set pin 2 to LOW
  delay(offTime);  //wait for the offTime seconds (see top of this code) 

  digitalWrite(LED2, HIGH);  //set pin 3 to HIGH 
  delay(onTime);      //wait for the onTime seconds (see top of this code)                    
  digitalWrite(LED2, LOW); // Set pin 3 to LOW  
  delay(offTime);  //wait for the offTime seconds (see top of this code)    

  digitalWrite(LED3, HIGH); //set pin 4 to HIGH  
  delay(onTime);     //wait for the onTime seconds (see top of this code)                     
  digitalWrite(LED3, LOW); // Set pin 4 to LOW  
  delay(offTime);   //wait for the offTime seconds (see top of this code)   

  digitalWrite(LED4, HIGH);  //set pin 5 to HIGH 
  delay(onTime);    //wait for the onTime seconds (see top of this code)                      
  digitalWrite(LED4, LOW);  // Set pin 5 to LOW 
  delay(offTime);    //wait for the offTime seconds (see top of this code)                               

  digitalWrite(LED5, HIGH);  //set pin 6 to HIGH 
  delay(onTime);    //wait for the onTime seconds (see top of this code)                      
  digitalWrite(LED5, LOW);  // Set pin 6 to LOW 
  delay(offTime);    //wait for the offTime seconds (see top of this code)                               
// Watch full details and demonstration: https://youtu.be/7xTHaFdCyaI
}