#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Servo.h>

#define SERVO_PIN 9
#define POT_PIN A0

Servo myServo;

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] = {5, 4, 3, 2}; 
byte colPins[COLS] = {8, 7, 6, 10}; 
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup() {
  lcd.init(); 
  lcd.backlight(); 
  myServo.attach(SERVO_PIN);
}

void loop() {
  char key = keypad.getKey();
  if (key != NO_KEY) {
    switch(key) {
      case '1':
        lcd.setCursor(0,0);
        lcd.print("Level 1");
        break;
      case '2':
        lcd.setCursor(0,0);
        lcd.print("Level 2");
        break;
      case '3':
        lcd.setCursor(0,0);
        lcd.print("Level 3");
        break;
    }
  }
  int potValue = analogRead(POT_PIN);
  int servoValue = map(potValue, 0, 1023, 0, 180);
  myServo.write(servoValue);
  delay(10);
}