// Define the LED pin and reset pin
const int ledPin = 13;
const int resetPin = 2; // Button connected to pin 2 (for manual reset)

// Define the starting countdown time in seconds
int countdownTime = 5; // 60 seconds

void setup() {
  // Initialize the LED pin as an output
  pinMode(ledPin, OUTPUT);
  
  // Initialize the reset pin as an input with internal pull-up resistor
  pinMode(resetPin, INPUT_PULLUP); // Button press will trigger a reset
  
  // Start serial communication for debugging
  Serial.begin(9600);
}

void loop() {
  // Check if countdownTime is greater than 0
  if (countdownTime > 0) {
    // Print the countdown value to the Serial Monitor
    Serial.print("Time remaining: ");
    Serial.println(countdownTime);
    
    // Decrease the countdown value by 1
    countdownTime = countdownTime - 1;;
    
    // Wait for 1 second before continuing the countdown
    delay(1000); // Delay for 1000 milliseconds (1 second)
  }
  else {
    // Once countdown reaches 0, turn on the LED
    digitalWrite(ledPin, HIGH);
    
    // Print a message indicating the LED is on
    Serial.println("Countdown complete! LED ON.");
    
    // Wait for 5 seconds before resetting the countdown automatically
    delay(5000); // Delay for 5000 milliseconds (5 seconds)
    
    // Reset the countdown to 60 seconds after 5 seconds
    countdownTime = 5;
    
    // Turn off the LED after the reset
    digitalWrite(ledPin, LOW);
    
    // Print a message indicating the countdown has been reset
    Serial.println("Countdown reset to 5 seconds.");
  }
  
  // If the button connected to resetPin is pressed, reset the countdown manually
  if (digitalRead(resetPin) == LOW) {
    countdownTime = 60;
    digitalWrite(ledPin, LOW); // Turn off LED when reset
    Serial.println("Countdown manually reset to 5 seconds.");
    delay(500); // Delay to debounce the button
  }
}