#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int analogPin = A0;
int ledMerah = 3;
int ledKuning = 4;
int ledHijau = 5;
int val = 0;
int kedip = 0;

void setup()
{
  pinMode(analogPin, INPUT);
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledHijau, OUTPUT);
  lcd.init();
  lcd.backlight();
  lcd.print("Persentase");
}

void loop()
{
  val = analogRead(analogPin);    
  int pwm = map(val,0,1023,0,100);
  
  lcd.setCursor(0,1);
  lcd.print(pwm);
  lcd.print("%");

  digitalWrite(ledHijau, !!pwm);
  digitalWrite(ledKuning, pwm >=34);
  digitalWrite(ledMerah, pwm>=67);

  if(pwm==100)
  {
    kedip =! kedip;
    digitalWrite(ledHijau, kedip);
    digitalWrite(ledKuning, kedip);
    digitalWrite(ledMerah, kedip);
  }

  delay(500);
}