#include <Servo.h>
#include <LiquidCrystal_I2C.h>
Servo myservo;

int angle = 0;

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void printAngle(int angle) {
  lcd.setCursor(0, 0);
  if (angle < 10){
    lcd.print("00");
    lcd.print(angle);
  }
  else if (angle < 100){
    lcd.print('0');
    lcd.print(angle);
  }
  else {
    lcd.print(angle);
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Hello wrld");
  myservo.attach(9);
  pinMode(12, INPUT_PULLUP);
  pinMode(13, INPUT_PULLUP);
  myservo.write(0);
  lcd.init();
  lcd.backlight();

}

void loop() {
  if (digitalRead(12) == LOW)
  {
    if (angle != 180) angle+=10;
    myservo.write(angle);
    printAngle(angle);
    delay(50);
  }
  if (digitalRead(13) == LOW)
  {
    if (angle != 0) angle -= 10;
    myservo.write(angle);
    printAngle(angle);
    delay(50);
  }

}