#include <IRremote.h>

int RECV_PIN = 2;         // IR receiver pin

const unsigned long KEYUPCODE = 0x20DFE21D;
const unsigned long KEYOKCODE = 0x20DFD22D;
const unsigned long KEYDOWNCODE = 0x20DF12ED;

IRrecv irrecv(RECV_PIN);
decode_results results;

 int loga[64]= { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
 11, 12, 13, 14, 16, 18, 20, 22, 25, 28, 30, 33, 36, 39,
 42, 46, 49, 53, 56, 60, 64, 68, 72, 77, 81, 86, 90, 95,
 100, 105, 110, 116, 121, 127, 132, 138, 144, 150, 156,
 163, 169, 176, 182, 189, 196, 203, 210, 218, 225, 233,
 240, 248, 255 };

int ledPin1 = 6;          // PWM output pin 1

int tmax = 60;            // max random delay
int tmin = 15;            // min delay
int light = 40;           // start lightness of LED
int step;                 // random lightness step

void setup()
{
  Serial.begin(9600);     // Serial port to debugging
  irrecv.enableIRIn();    // Start the receiver
  randomSeed(0);          // Stard random generator
}

  int i = 0;
  unsigned long last = millis();

void loop() {

    if (irrecv.decode(&results)) {
    // If it's been at least 1/4 second since the last
    // IR received, toggle the relay
    if (millis() - last > 250) {

      switch (results.value){
       case KEYUPCODE:             // key UP pressed
   step=random(-5,5);              // -5... +5
   light = light+step;
     if(light>=64) light=61;       // max light = 64
     if(light<=9) light=12;        // min light = 10
   analogWrite (ledPin1, loga[light]); 
   delay (random(tmax)+tmin); 
       break;
       case KEYOKCODE:             // key OK pressed (STOP)
   analogWrite (ledPin1, 0); 
       break;
       case KEYDOWNCODE:           // key DOWN pressed
   analogWrite (ledPin1, 0); 
       break;
     }
    }
    last = millis();      

  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);    // debug to serial monitor
    irrecv.resume();                       // Receive the next value
  }
 }
}