This sample code is for Controlling LED on Maker UNO (Arduino) using IR Remote's Tutorial.

IRremote.ino

// 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 0xCD3221DE:

        if (redState == 0) {
          digitalWrite(RED, HIGH);
          redState = 1;
        }
        else {
          digitalWrite(RED, LOW);
          redState = 0;

        }
        break;

      case 0xCD32916E:

        if (greenState == 0) {
          digitalWrite(GREEN, HIGH);
          greenState = 1;
        }
        else {
          digitalWrite(GREEN, LOW);
          greenState = 0;

        }
        break;

      case 0xCD329B64:

        if (yellowState == 0) {
          digitalWrite(YELLOW, HIGH);
          yellowState = 1;
        }
        else {
          digitalWrite(YELLOW, LOW);
          yellowState = 0;

        }
        break;

      case 0xCD326996:

        if (blueState == 0) {
          digitalWrite(BLUE, HIGH);
          blueState = 1;
        }
        else {
          digitalWrite(BLUE, LOW);
          blueState = 0;

        }
        break;


    }
    irrecv.resume();
  }

}