#include <Keypad.h>
#include <Adafruit_NeoPixel.h>

int led=12,buz=11,pin=10;

int lednumber = 40;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(lednumber,pin);

  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 col[cols]={5,4,3,2};
  uint8_t row[rows]={9,8,7,6};

  Keypad keypad= Keypad(makeKeymap(keys),row,col,rows,cols);

  // put your setup code here, to run once:
void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
   pinMode(buz, OUTPUT);
   ring.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
char key=keypad.getKey();
if(key!=NO_KEY){
  Serial.println(key);
}
  if(key=='1'){
  digitalWrite(led, HIGH);
  delay(100);
  }
  else{
    digitalWrite(led, LOW);
     delay(100);
  }
 

 if(key=='2'){
  tone(buz, 1000); // Send 1KHz sound signal...
  delay(200);        // ...for 1 sec
  noTone(buz);     // Stop sound...
  delay(1000);
  }

   if(key=='3'){
    for (int i=0; i < lednumber; i++){
    int remainder = i%3;
    if (remainder == 1){
      ring.setPixelColor(i, ring.Color(116, 183, 237));
      ring.show();
      delay(100);
    }
    else if (remainder == 2){
      ring.setPixelColor(i, ring.Color(252, 68, 176));
      ring.show();
      delay(100);
    }
    else{
      ring.setPixelColor(i, ring.Color(189, 116, 237));
      ring.show();
      delay(100);
    }
  }
   }
 

}