#include <Keypad.h>
const int led1=10,led2=11,led3=12;
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};
uint8_t rowPins[ROWS]= {9,8,7,6};
Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,ROWS,COLS);
void setup(){
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}
void loop(){
  char key = keypad.getKey();

  if(key=='0'){
    digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
  }
  if(key=='1'){
    digitalWrite(led1, HIGH);
     digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
  }
    if(key=='2'){
    digitalWrite(led1, LOW);
     digitalWrite(led2, HIGH);
      digitalWrite(led3, LOW);
  }
  if(key=='3'){
    digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
      digitalWrite(led3, HIGH);
  }
    if(key=='4'){
    digitalWrite(led1, HIGH);
     digitalWrite(led2, HIGH);
      digitalWrite(led3, LOW);
  }
  if(key=='5'){
    digitalWrite(led1, LOW);
     digitalWrite(led2, HIGH);
      digitalWrite(led3, HIGH);
  }
    if(key=='6'){
    digitalWrite(led1, HIGH);
     digitalWrite(led2, LOW);
      digitalWrite(led3,HIGH);
  }
  if(key=='7'){
    digitalWrite(led1, HIGH);
     digitalWrite(led2, HIGH);
      digitalWrite(led3, HIGH);
  }
}