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

LiquidCrystal_I2C lcd(0x27,20,4);  

void setup()
{
  lcd.init();                     
  lcd.init();
  lcd.backlight();
  pinMode(10, OUTPUT);
}


void loop()
{
  int value = analogRead(A0);
  int LED = map(value,0,1023,0,255);
  int display = map(value,0,1023,0,100);

  lcd.setCursor(0,0);
  lcd.print(display);
  lcd.print("%  ");

  analogWrite(10,LED);
}