#include <Keypad.h>
const byte rows = 4; 
const byte cols = 4; 
char keys[rows][cols] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'},
  
};
byte rowPins[rows] = {9,8,7,6}; 
byte colPins[cols] = {5,4,3,2}; 
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, rows, cols );
String intendedKeyCode = "";
int num = 0;
char key;
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcdabed(0x27,16,2);
void setup() {
 lcdabed.init();
  lcdabed.backlight(); 
  lcdabed.clear();
  pinMode(10, INPUT);
 
}

void loop() {
 key = keypad.getKey();
  if(key != NO_KEY)
  {

   lcdabed.setCursor(5,0);
  lcdabed.print(key);
  delay(500);

}
if (key == 'B' || key == 'C' )
{ digitalWrite(10, 1);
 delay(500);
}
if(key == '0' || key == '1')
digitalWrite(10,0);
}