#define LED_RED 5
#define LED_YELLOW 18
#define LED_GREEN 19

#define BLYNK_TEMPLATE_ID "TMPL6ECP1E1nc"
#define BLYNK_TEMPLATE_NAME "Home automation"
#define BLYNK_AUTH_TOKEN "AO4j4Og9mWl4i6JzsYotUMR5yW_avBtA"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const char ssid[] = "Wokwi-GUEST";
const char pass[] = ""; 
const char auth[] = BLYNK_AUTH_TOKEN;

int greenTime = 2;
int yellowTime = 2;
int redTime = 2;

BLYNK_WRITE(V0) {
  greenTime = param.asInt();
}

BLYNK_WRITE(V1) {
  yellowTime = param.asInt();
}

BLYNK_WRITE(V2) {
  redTime = param.asInt();
}

void setup() {
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  pinMode(LED_RED, OUTPUT);
  pinMode(LED_YELLOW, OUTPUT);
  pinMode(LED_GREEN, OUTPUT);

  Blynk.virtualWrite(V0, 2);
  Blynk.virtualWrite(V1, 2);
  Blynk.virtualWrite(V2, 2);
  lcd.init( );
  lcd.backlight();
  
}
void loop() {
  Blynk.run();
  update();
}

void update() {
    digitalWrite(LED_GREEN, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Green:   ");
    for (int i = greenTime; i >= 0; i--) {
      lcd.setCursor(7, 0);
      lcd.print(i);
      delay(1000);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Green:   ");
    }
    digitalWrite(LED_GREEN, LOW);

    digitalWrite(LED_YELLOW, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Yellow:  ");
    for (int i = yellowTime; i >= 0; i--) {
      lcd.setCursor(8, 0);
      lcd.print(i);
      delay(1000);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Yellow:  ");
    }
    digitalWrite(LED_YELLOW, LOW);

    digitalWrite(LED_RED, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Red:     ");
    for (int i = redTime; i >= 0; i--) {
      lcd.setCursor(7, 0);
      lcd.print(i);
      delay(1000);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Red:     ");
    }
    digitalWrite(LED_RED, LOW);
}