#include<Keypad.h>
#define CLOCK 2
#define LATCH 3
#define DATA 4

int num[] = {252 ,96, 218, 242, 102, 182, 190, 224, 254, 246, 238, 62, 156, 122}; 

void printNum(int inputKey) {
    digitalWrite(LATCH, LOW);
    shiftOut(DATA, CLOCK, LSBFIRST, inputKey);
    digitalWrite(LATCH, HIGH);
}

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

byte rowPins[] = {5, 6, 7, 8};
byte colPins[] = {9, 10, 11, 12};

Keypad myKey = Keypad(makeKeymap(keys), rowPins, colPins, 4, 4);


void setup()
{
  pinMode(CLOCK, OUTPUT);
  pinMode(LATCH, OUTPUT);
  pinMode(DATA, OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  char inputKey = myKey.getKey();
  if (inputKey >= '0' && inputKey <= '9') {
    int numIndex = inputKey - '0';        
    printNum(num[numIndex]);              
    Serial.println(inputKey); 
  } else if (inputKey >= 'A' && inputKey <= 'D') {
    int numIndex = 10 + (inputKey - 'A');  
    printNum(num[numIndex]);               
    Serial.println(inputKey);              
  }
}