#include <Keypad.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
char keys[ROWS][COLS]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS]={A0, A1, 1, 2}; //connect to the row pinouts of keypad
byte colPins[COLS]={3, 4, 5, 6}; //connect to the column pinouts of keypad
int LCDCol = 0;
int LCDRow = 0;

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.setCursor(LCDCol, LCDRow);
  }

void loop(){
  char key = keypad.getKey();
  
  if (key){
    Serial.println(key);
    
    if (LCDCol > 15){
      ++LCDRow;
      
      if (LCDRow > 1){
        LCDRow=0; LCDCol=0; lcd.clear();
      }
    
    LCDCol = 0;  
    }
    
    lcd.setCursor (LCDCol, LCDRow);
      lcd.print(key);
      ++LCDCol;
    }
}