#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

byte a,b,c,d;
int codeSecret[4] ={0,0,0,5};
int codeEncours[4]={0};
byte positionCode =0;

bool comparerCodes(int liste1[], int liste2[], int taille) {
  for (int i = 0; i < taille; i++) {
    if (liste1[i] != liste2[i]) {
      return false; // Les listes ne sont pas identiques
    }
  }
  return true; // Les listes sont identiques
}

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(5,1); 
  pinMode(8, INPUT_PULLUP);
  pinMode(9, INPUT_PULLUP);
}

void loop() {
if (!digitalRead(8)){delay(200);a = (a+1)%10;};
if (!digitalRead(9)){
  delay(300);
  codeEncours[positionCode] =a;
  positionCode++;}

if (positionCode<4){
  lcd.setCursor(0,0); lcd.print("CODE : ");
  lcd.setCursor(positionCode,1); lcd.print(a);}

  if (comparerCodes(codeSecret, codeEncours, 4)) {
       lcd.setCursor(0,0);
    lcd.print("Code ACCEPTE");
    lcd.setCursor(0,1);
    lcd.print("OUVERTURE");
        delay(500);
  lcd.clear();
    a=0;
    positionCode=0;
    for (int i=0;i<4;i++){codeEncours[i]=0;}
        } 

    if (!comparerCodes(codeSecret, codeEncours, 4) and positionCode==4 )
     { lcd.setCursor(0,0);
    lcd.print("Code ERRONE");
    lcd.setCursor(0,1);
    lcd.print("RECOMMENCEZ");
    delay(500);
    lcd.clear();
    a=0;
    positionCode=0;
    for (int i=0;i<4;i++){codeEncours[i]=0;} 
}
}