// 22.11.4562 - Muhammad Guido Augusta

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

const int ledRed = 11;
const int ledYellow = 12;
const int ledGreen = 13;

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.begin(16,2);

  pinMode(A0, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(A0);
  int persentase = map(value, 0, 1023, 0, 100);

  if(persentase >= 0 && persentase <= 33){
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledGreen, HIGH);
  } else if(persentase >= 34 && persentase <= 66) {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, HIGH);
  } else if(persentase >= 67 && persentase <= 99) {
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, HIGH);
  } else {
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, HIGH);
    delay(500);
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledGreen, LOW);
    delay(500);
  }

  lcd.setCursor(0,0);
  lcd.print("persentase:");

  lcd.setCursor(11,0);
  lcd.print(persentase);
  lcd.print("   ");
  
  lcd.setCursor(14,0);
  lcd.print("%");
  delay(500);
}