#include <Keypad.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#define LED_PIN 10
#define BUTTON_PIN 11

LiquidCrystal_I2C lcd(0x27,20,4); 

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4
#define RAND_MAX 0x7FFF
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);



void setup() {
  Serial.begin(9600);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
  lcd.init();                      // initialize the lcd 
  lcd.init();

}

void loop() {
  char key = keypad.getKey();
  int nr_apasari=0;
  while(nr_apasari < 3)
  {
    if (digitalRead(BUTTON_PIN) == HIGH ) {
    nr_apasari++;
    
    
  }
  }
 
 if(nr_apasari == 3)
 lcd.print(random(1,4));
 
}