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

LiquidCrystal_I2C lcd(0x027, 16, 2);

Servo servo;
int angle =0;
int direction=1;
int pot = A0;
int speed=0;

void setup() {
  // put your setup code here, to run once:
  servo.attach(11);

  lcd.begin(16,2);
  lcd.backlight();
  lcd.setCursor(0,0);
}

void loop() {
  // put your main code here, to run repeatedly:
    speed = map(analogRead(pot),0,1023, 50,10);

    if(angle>180)
      {
        angle=180;
        direction=-1;
      }
    if(angle < 0)
    {
      angle =0;
      direction=1;
    }
    
    angle += direction;
    servo.write(angle);

    lcd.print("angle: ");
    lcd.print(angle);
    lcd.print("      ");
   
    lcd.setCursor(0,1);
    lcd.print("speed: ");
    lcd.print(speed);
    lcd.print("      ");

    lcd.setCursor(0,0);
    delay(speed);
}