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

int blink = 0;

void setup() {
  pinMode(A0, INPUT);
  pinMode(3, OUTPUT); // Merah
  pinMode(4, OUTPUT); // Kuning
  pinMode(5, OUTPUT); // Hijau
  lcd.init();
  lcd.backlight();
}

void loop() {
  lcd.clear();
  int data = analogRead(A0);
  int hasil = map(data,0,1023,0,100);
  lcd.print(hasil);
  lcd.print("%");

  digitalWrite(5, hasil);
  digitalWrite(4, hasil >= 34);
  digitalWrite(3, hasil >= 67);

  if(hasil == 100){
    blink = !blink;
    digitalWrite(5, blink);
    digitalWrite(4, blink);
    digitalWrite(3, blink);
  }
  delay(500);
}