#include <LiquidCrystal_I2C.h>
 LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows



#define GOMB1 6
#define GOMB2 7
#define GOMB3 8
#define GOMB4 9

int kod[4];
int i=0;



void setup() {
  // put your setup code here, to run once:
  pinMode(GOMB1, INPUT);
  pinMode(GOMB2, INPUT);
  pinMode(GOMB3, INPUT);
  pinMode(GOMB4, INPUT);

  lcd.init(); //initialize the lcd
  lcd.backlight(); //open the backlight 

}

void loop() {
  // put your main code here, to run repeatedly:

  if(digitalRead(GOMB1))
  {

    kod[i]=1;
    lcd.print(kod[i]);
    i++;
    delay(300);
  }

    if(digitalRead(GOMB2))
  {
  

    kod[i]=2;
    lcd.print(kod[i]);
    i++;
    delay(300);


  }

    if(digitalRead(GOMB3))
  {
    

    kod[i]=3;
    lcd.print(kod[i]);
    i++;
    delay(300);

  }

    if(digitalRead(GOMB4))
  {
    

    kod[i]=4;
    lcd.print(kod[i]);
    i++;
    delay(300);



    if(i==4)
    {
      lcd.print("DOCI");
    }
  }
}