// Define the LED and pushbutton pins
const int LED_PIN = 9;
const int BUTTON_PIN = 2;

// Define the state variables
bool ledOn = false;
bool buttonPressed = false;
unsigned long buttonPressTime = 0;

// Define the timing variables for blinking the LED
const unsigned long BLINK_PERIOD = 500;  // Blink period in milliseconds
unsigned long lastBlinkTime = 0;         // Time of the last blink

void setup() {
  // Set the LED pin as an output
  pinMode(LED_PIN, OUTPUT);

  // Set the button pin as an input with internal pull-up resistor enabled
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  // Read the button state and update the buttonPressTime variable if the button was just pressed
  bool buttonState = digitalRead(BUTTON_PIN);
  if (buttonState == LOW && buttonPressed == false) {
    buttonPressed = true;
    buttonPressTime = millis();
  } else if (buttonState == HIGH) {
    buttonPressed = false;
  }

  // Determine the desired LED state based on the button press time
  bool newLedOn = ledOn;
  if (buttonPressed == true) {
    if (millis() - buttonPressTime < 2000) {
      newLedOn = !ledOn;
    } else {
      newLedOn = false;
      if (millis() - lastBlinkTime >= BLINK_PERIOD) {
        analogWrite(LED_PIN, 255);
        delay(100);
        analogWrite(LED_PIN, 0);
        lastBlinkTime = millis();
      }
    }
  }

  // Update the LED state if it has changed
  if (newLedOn != ledOn) {
    ledOn = newLedOn;
    if (ledOn) {
      digitalWrite(LED_PIN, HIGH);
    } else {
      digitalWrite(LED_PIN, LOW);
    }
  }
}