#include<Keypad.h>
#include<Adafruit_NeoPixel.h>
#define PIN       12  // Digital pin connected to the NeoPixels
#define NUMPIXELS 4
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
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]={2,3,4,5};
byte colPins[COLS]={6,7,8,9};
Keypad keypad=Keypad(makeKeymap(keys),rowPins,colPins,ROWS,COLS);
void setup() {
  // put your setup code here, to run once:   
  Serial.begin(9600);
  pixels.begin();
  pixels.show();
}

void loop() {
  // put your main code here, to run repeatedly:
  char key= keypad.getKey();
  if(key)
  {
    Serial.println(key);
  }
     
  if(key=='2')
  {
    
      pixels.setPixelColor(0,pixels.Color(255, 0, 0)); 
  }
  else if(key=='4')
  {
    pixels.setPixelColor(0,pixels.Color(0, 255, 0)); 
  }
   else if(key=='6')
  {
     pixels.setPixelColor(0,pixels.Color(0, 0, 225)); 

  }
   else if(key=='8')
  {
     pixels.setPixelColor(0,pixels.Color(255, 225, 0)); 
  }
   else if(key=='0')
  {
     pixels.setPixelColor(0,pixels.Color(0, 255, 255)); 
  }

  pixels.show();
}