#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

unsigned long millisAnterior = 0;
const long intervalo = 1000;
int timer = 10;
int timerR = 10;
int timerY = 5;
int timerG = 15;
bool contando = true;

void setup() {
  Serial.begin(9600);

  lcd.begin(16,2);

  DDRD = B11111100;
  DDRC = B10;
}

void loop() {
  timer10();
}

/*void contador(){
  unsigned long millisAtual = millis();

  if (millisAtual - millisAnterior >= intervalo && contando == true) {
    millisAnterior = millisAtual;
    lcd.clear();
    lcd.home();
    lcd.print("Aberto");
    lcd.setCursor(0,1);
    lcd.print("00:0" + String(timer));
    Serial.println("00:0" + String(timer));
    timer--;
    if (timer <= 0)
    {
      contando = false;
      //timer = 5;
    }
  }
}*/

void timer10(){
  unsigned long millisAtual = millis();

  if (millisAtual - millisAnterior >= intervalo && contando == true) {
    millisAnterior = millisAtual;
    lcd.clear();
    lcd.home();
    lcd.print("Aberto");
    lcd.setCursor(0,1);
    
    if(timer >= 10){    
      lcd.print("00:" + String(timer));
      Serial.println("00:" + String(timer));
    } else {    
      lcd.print("00:0" + String(timer));
      Serial.println("00:0" + String(timer));
    }
    timer--;
    if (timer <= 0)
    {
      contando = false;
      //timer = 5;
    }
  }
}