Control led light using remote

 // Include IR Remote Library by Ken Shirriff

#include <IRremote.h>

// Define sensor pin

const int RECV_PIN = 4;

// Define LED pin

#define RED    8

#define GREEN  9

#define YELLOW 10

#define BLUE   11

// Define integer to remember toggle state

int redState = 0;

int greenState = 0;

int yellowState = 0;

int blueState = 0;

// Define IR Receiver and Results Objects

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup() {

  // Enable the IR Receiver

  irrecv.enableIRIn();

  // Set LED pins as Outputs

  pinMode(RED, OUTPUT);

  pinMode(GREEN, OUTPUT);

  pinMode(YELLOW, OUTPUT);

  pinMode(BLUE, OUTPUT);

}

void loop() {

  if (irrecv.decode(&results)) {

    switch (results.value) {

      case  0x6785E38A:

        if (redState == 0) {

          digitalWrite(RED, HIGH);

          redState = 1;

        }

        else {

          digitalWrite(RED, LOW);

          redState = 0;

        }

        break;

      case  0x823E3FB6:

        if (greenState == 0) {

          digitalWrite(GREEN, HIGH);

          greenState = 1;

        }

        else {

          digitalWrite(GREEN, LOW);

          greenState = 0;

        }

        break;

      case  0xBDF598EE:

        if (yellowState == 0) {

          digitalWrite(YELLOW, HIGH);

          yellowState = 1;

        }

        else {

          digitalWrite(YELLOW, LOW);

          yellowState = 0;

        }

        break;

      case  0x783D9008:

        if (blueState == 0) {

          digitalWrite(BLUE, HIGH);

          blueState = 1;

        }

        else {

          digitalWrite(BLUE, LOW);

          blueState = 0;

        }

        break;

    }

    irrecv.resume();

  }

}