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

LiquidCrystal_I2C lcd(0x27, 16, 2);

int green = 3;  
int yellow = 2;
int red = 4;

void setup() {
  pinMode(A0, INPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(red, OUTPUT);

  lcd.init(); 
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Potensio:"); 
}

void loop() {
  int potValue = analogRead(A0);
  int percentage = map(potValue, 0, 1023, 0, 100);

  lcd.setCursor(0, 1);
  lcd.print("Persentase: ");
  lcd.print(percentage);
  lcd.print("%   "); 

  if (percentage >= 0 && percentage <= 33) {
    digitalWrite(green, HIGH);
    digitalWrite(yellow, LOW);
    digitalWrite(red, LOW);
  } else if (percentage >= 34 && percentage <= 66) {
    digitalWrite(green, HIGH);
    digitalWrite(yellow, HIGH);
    digitalWrite(red, LOW);
  } else if (percentage >= 67 && percentage <= 99) {
    digitalWrite(green, HIGH);
    digitalWrite(yellow, HIGH);
    digitalWrite(red, HIGH);
  } else if (percentage == 100) {
    digitalWrite(green, HIGH);
    digitalWrite(yellow, HIGH);
    digitalWrite(red, HIGH);
    delay(200);
    digitalWrite(green, LOW);
    digitalWrite(yellow, LOW);
    digitalWrite(red, LOW);
    delay(200);
  }
  delay(250);
}