#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

int nilai;
void setup() {
 // put your setup code here, to run once:
Serial.begin(9600);
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
lcd.begin(16, 2);
lcd.backlight();
}
void loop() {
   // put your main code here, to run repeatedly:
    nilai = analogRead(A0);
    Serial.print("nilai = ");
    Serial.println(nilai);
    lcd.setCursor(0, 1);
    lcd.print("nilai = ");
    lcd.println(nilai);
    delay(500);
    if (nilai > 200 && nilai < 400) {
    digitalWrite(13, HIGH);
    }
  else {
    digitalWrite(13, LOW);
    }
    if (nilai > 500 && nilai < 600) {
    digitalWrite(12, HIGH);
    }
  else {
    digitalWrite(12, LOW);
    }
    if (nilai > 700 && nilai < 800) {
    digitalWrite(11, HIGH);
    }
  else {
    digitalWrite(11, LOW);
    }
}