#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27,16,2);
const int butonNext = 2;
const int butonPrev = 3;

String optiuni[] = {"Mod A", "Mod B", "Mod C"};
int index = 0;
int total = 3;

void setup() {
  pinMode(butonNext, INPUT_PULLUP);
  pinMode(butonPrev, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Selectare mod:");
  lcd.setCursor(0,1);
  lcd.print(optiuni[index]);


}

void loop() {
  if(digitalRead(butonNext) ==LOW) {
    index= (index  + 1 ) % total;
    lcd.setCursor(0,1);
    lcd.print("               ");
    lcd.setCursor(0,1);
    lcd.print(optiuni[index]);
    delay(300);
    
  }
  if(digitalRead(butonPrev) == LOW){
    index= (index - 1 + total) % total;
    lcd.setCursor(0,1);
    lcd.print("                 ");
    lcd.setCursor(0,1);
    lcd.print(optiuni[index]);
    delay(300);
  }

}