#include <Keypad.h>
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] = {A1,A2,A3,A4};
uint8_t rowPins[ROWS]= {5,4,3,2};
Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,ROWS,COLS);

void setup() {
  Serial.begin(9600);
  pinMode(6, OUTPUT);

}

void loop() {
  char key = keypad.getKey();
  switch (key) {
  case '1':
    analogWrite(6,10);
    break;
  case '2':
    analogWrite(6,50);
    break;
  case '3':
    analogWrite(6, 100);
    break;
  case '4':
    analogWrite(6, 150);
    break;
  case '5':
    analogWrite(6, 225);
    break;
  case 'A':
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
    break;
  case 'B':
    digitalWrite(6, HIGH);
    delay(725);
    digitalWrite(6, LOW);
    delay(725);
    digitalWrite(6, HIGH);
    delay(725);
    digitalWrite(6, LOW);
    delay(725);
    digitalWrite(6, HIGH);
    delay(725);
    digitalWrite(6, LOW);
    delay(725);
    digitalWrite(6, HIGH);
    delay(725);
    digitalWrite(6, LOW);
    delay(725);
    digitalWrite(6, HIGH);
    delay(725);
    digitalWrite(6, LOW);
    delay(725);
    break;
  case 'C':
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);
    delay(500);
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);
    delay(500);
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);
    delay(500);
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);
    delay(500);
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);
    delay(500);
    break;
  case 'D':
    digitalWrite(6, HIGH);
    delay(250);
    digitalWrite(6, LOW);
    delay(250);
    digitalWrite(6, HIGH);
    delay(250);
    digitalWrite(6, LOW);
    delay(250);
    digitalWrite(6, HIGH);
    delay(250);
    digitalWrite(6, LOW);
    delay(250);
    digitalWrite(6, HIGH);
    delay(250);
    digitalWrite(6, LOW);
    delay(250);
    digitalWrite(6, HIGH);
    delay(250);
    digitalWrite(6, LOW);
    delay(250);
    break;
  }
}