/*  Name     : main.c
 *  Purpose  : Source code for LED Interfacing with ATmega328p.
 *  Author   : Gemicates
 *  Date     : 27-12-2017
 *  Website  : www.gemicates.org
 *  Revision : None
 */
 
#include "Arduino.h"

// Pin 9, 10, 11 have LED's connected on Arduino board

const int LED1 = 9, LED2 = 10, LED3 = 11;

// the setup routine runs once when you press reset

void setup()
{
  pinMode(LED1, OUTPUT);                        // initialize the digital pins as an output
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
}

// the loop routine runs over and over again forever

void loop()

{
  digitalWrite(LED1, HIGH);                     // turn the LED1 ON by making the voltage level HIGH
  delay(100);                                   // function call for delay
  digitalWrite(LED1, LOW);                      // turn the LED1 OFF by making the voltage LOW
  delay(100);                                   // function call for delay 
  digitalWrite(LED2, HIGH);                     // turn the LED2 ON by making the voltage level HIGH
  delay(100);                                   // function call for delay
  digitalWrite(LED2, LOW);                      // turn the LED2 OFF by making the voltage LOW
  delay(100);                                   // function call for delay
  digitalWrite(LED3, HIGH);                     // turn the LED3 ON by making the voltage level HIGH
  delay(100);                                   // function call for delay
  digitalWrite(LED3, LOW);                      // turn the LED3 OFF by making the voltage LOW
  delay(100);                                   // function call for delay
}