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

LiquidCrystal_I2C lcd(0x27,24,2);


Servo myservo;  
int pos = 0; 
int ledPin = 3;
int analogPin = 0;
int VR = 0; 
void setup() 
{
  myservo.attach(9);
  pinMode(ledPin, OUTPUT); 
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print("hello, world!");
  lcd.setCursor(2,1);
  lcd.print("Ywrobot Arduin");
  delay(5000);
}

void loop() 
{
 for (pos = 0; pos <= 180; pos += 1) 
  { 
    myservo.write(pos);              
    delay(VR);                      
  }
  for (pos = 180; pos >= 0; pos -= 1) 
  {
    myservo.write(pos);             
    delay(VR);                       
  }
VR = analogRead(analogPin);
 lcd.setCursor(0,0);
 lcd.print("VR Value =");
 lcd.println(VR);
 int PWM = map(VR,0,1023,0,255);
 lcd.setCursor(0,1);
 lcd.print("PWM Value =");
 lcd.println(PWM);
 delay(1000);
 lcd.clear();
 analogWrite(ledPin,PWM);
 delay(2000);
}