Arduino Camera control via IR

CameraIrControl.ino

#include <IRremote.h>

int RECV_PIN = 10;
int PIN_TAKE = 5;
int PIN_FOCUS = 2;
int PIN_TAKE_INDICATOR = 13;

#define Zero 0xFF6897
#define One  0xFF30CF

long numerals[] = {
  0xFF6897, //0
  0xFF30CF, //1
  0xFF18E7, //2
  0xFF7A85, //3
  0xFF10EF, //4
  0xFF38C7, //5
  0xFF5AA5, //6
  0xFF42BD, //7
  0xFF4AB5, //8
  0xFF52AD //9  
};

#define key_plus100 0xFF9867
#define key_plus200 0xFFB04F
#define key_minus 0xFFE01F
#define key_plus 0xFFA857
#define key_eq 0xFF906F
#define key_ch_minus 0xFFA25D
#define key_channel 0xFF629D
#define key_ch_plus 0xFFE21D
#define key_previous 0xFF22DD
#define key_next 0xFF02FD
#define key_play_pause 0xFFC23D

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
  pinMode(PIN_TAKE, OUTPUT);
  pinMode(PIN_FOCUS, OUTPUT);
  pinMode(PIN_TAKE_INDICATOR, OUTPUT);
}

int shutterMs = 100;

void take(int n) {
  for(int i=0; i<n; i++) {    
    Serial.print("Take ");
    Serial.print(i+1);
    Serial.print(" of ");
    Serial.println(n);
    digitalWrite(PIN_TAKE, HIGH);
    digitalWrite(PIN_TAKE_INDICATOR, HIGH);
    delay(shutterMs);
    digitalWrite(PIN_TAKE_INDICATOR, LOW);
    digitalWrite(PIN_TAKE, LOW);    
    if (i < n-1)
      delay(250);
  }  
}

void incShutter(int ms){
  shutterMs += ms;
  Serial.print("Shutter: ");
  Serial.println(shutterMs);
}

void focus(int ms){
  Serial.println("Focussing");
  digitalWrite(PIN_FOCUS, HIGH);
  delay(ms);
  digitalWrite(PIN_FOCUS, LOW);
}

long last;

void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    if(results.value == key_plus100){
      incShutter(100);
    }
    if(results.value == key_plus200){
      incShutter(200);
    }
    if(results.value == key_eq){
      shutterMs = 0;
      incShutter(100);
    }
    if(results.value == numerals[0]){
      focus(500);
    }
    for(int i=1;i<10;i++){
      if(numerals[i] == results.value){
        Serial.println(i);
        take(i);
      }
    }
    if(results.value!=-1){
      last = results.value;
    }
    else
    { //repeat code
      
      if(last == numerals[0]){
        focus(500);
      }
    }
    irrecv.resume(); // Receive the next value
  }
}