#include <Keypad.h>

const int ROWS = 4;
const int COLS = 4;
const int ledKedip=13;
const int led[4]={A0,A1,A2,A3};
const int delayOn[3]={300,50,300};

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

byte colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
byte rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

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

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  for(int i=0;i<3;i++){
    pinMode(led[i], OUTPUT);
  }
}

void loop() {
  char customKey = keypad.getKey();
  if (customKey){
    Serial.println(customKey);
  }
 
  switch(customKey){
    case '1':
      kedip(1);
      break;
    case '2':
      kedip(2);
    break;  
    case '3':
      kedip(3);
      break;
    case '4':
      kedip(4);
      break;  
    case '5':
      kedip(5);
      break;
    case '6':
      kedip(6);
      break;  
    case '7':
      kedip(7);
      break; 
    case '8':
      kedip(8);
      break;
    case '9':
      kedip(9);
      break; 
    case 'A':
      digitalWrite(led[0], HIGH);
      break; 
    case 'B':
      digitalWrite(led[1], HIGH);
      break; 
    case 'C':
      digitalWrite(led[2], HIGH);
      break; 
    case 'D':
      digitalWrite(led[3], HIGH);
      break; 
    case '#':
      digitalWrite(led[0], LOW);
      digitalWrite(led[1], LOW);
      digitalWrite(led[2], LOW);
      digitalWrite(led[3], LOW);
      break; 
    default:
      kedip(0);
      break;
  }
}
void kedip(int jml){
  for(int i=1;i<=jml;i++){
    digitalWrite(ledKedip, HIGH);
    delay(500);
    digitalWrite(ledKedip, LOW);
    delay(500);
  }
}