IR controlled Arduino LED chain malfunction

#include "IRremote.h"
//assigning ir receiver to digital pin 2
int receiver = 2;

IRrecv irrecv(receiver); //creating an instance of irrecv
decode_results results; //create instance of decode results

//LEDs initialization
int lampka[] = {3, 5, 6, 9, 10, 11, 13};

//ir sensor initialization
int ir_sens = 2;

//photoresistor initialization at analog pin 0
int photo_res = 0;

int val = 255; //brightenss of the leds

int program = 1; //which program should be executed now?
int state = 1; //the chain should be turned on or turned off?
int mode = 1; //we input modes or brightness with the remote?

//function defining buttons of the remote
void translateIR()
{

 switch(results.value)
   {
    case 0xFF42BD: //* button
      mode = 1;
      break;

    case 0xFF52AD: //# button
      mode = 2;
      break;

     case 0xFF02FD: //ok button
       if (state == 1)
         state = 0;
       else
         state = 1;
       break;
    case 0xFF6897: //button 1
      if (mode == 1)
      program = 1;
      if (mode == 2)
      val = 25;
      break;

    case 0xFF9867: //button2
      if (mode == 1)
      program = 2;
      if (mode == 2)
      val = 50;
      break;

    case 0xFFB04F: //button3
      program = 3;
      break;
   }

}


//pierwszy program lancucha
//first program of the chain
void pierwszy()
{
 for(int wl_wyl = 0; wl_wyl < 7; wl_wyl++)
 {
  analogWrite(lampka[wl_wyl], val);
  delay(500);
  digitalWrite(lampka[wl_wyl], LOW);
 }
}

//drugi program programu
//second program of the chain
void staly()
{
 for(int wlacznik = 0; wlacznik < 7; wlacznik++)
 {
  analogWrite(lampka[wlacznik], val);
 }

 delay(3000);

 for(int wylacznik = 0; wylacznik < 7; wylacznik++)
 {
  digitalWrite(lampka[wylacznik], LOW);
 }
}


//trzeci program lancucha
//third program of the chain
void srodek()
{
 analogWrite(lampka[3], val);
 delay(500);
 analogWrite(lampka[0], val);
 delay(500);
 analogWrite(lampka[5], val);
 delay(500);
 analogWrite(lampka[1], val);
 delay(500);
 analogWrite(lampka[4], val);
 delay(500);
 analogWrite(lampka[2], val);
 delay(3000);

 for(int wylacznik = 0; wylacznik <7; wylacznik++)
 {
   digitalWrite(lampka[wylacznik], LOW);
   delay(100);
 }

}

void setup(){

  Serial.begin(9600);

  irrecv.enableIRIn(); //initialization of ir receiver

  //ustawienie wszystkich lampek jako piny wyjscia
  //setting all LED as output pins
  for (int ust_lamp = 0; ust_lamp < 7; ust_lamp++)
  {
    pinMode(lampka[ust_lamp],OUTPUT);
  }
}

void loop()
{
  Serial.print("Aktualny tryb to: ");
  Serial.println(mode);
  Serial.print("Aktualna jasność to: ");
  Serial.println(val);
  //właczenie lampek gdy jest ciemno
  //turning on LEDs when its dark
  if ((analogRead(photo_res) < 500)&& (state == 1))
  {
    //wykonujemy aktualnie wybrany program
    //we execute program which is currently set
    switch(program)
    {
      case 1:
        pierwszy();
        break;

      case 2:
        staly();
        break;

      case 3:
        srodek();
        break;
    }
  }

  else //wylaczamy lampki gdy jest zbyt jasno; if it's too bright we turn off the lights
  {
    for(int wyl_ciemnosc = 0; wyl_ciemnosc <7; wyl_ciemnosc++)
    {
     digitalWrite(lampka[wyl_ciemnosc], LOW);
    }
  }
  delay(1000);

  if (irrecv.decode(&results))
  {

   translateIR();
   irrecv.resume();

  }

}