int ledPin = 2; 
unsigned long previousMillis = 0; // Store the time of the last LED toggle

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

void loop() {
  unsigned long currentMillis = millis(); // Get the current time
  if (currentMillis - previousMillis < 500) {    
    digitalWrite(ledPin, HIGH);
    Serial.println("LED is ON");
    Serial.println("LED is ON");
    Serial.println("LED is ON");
  } else if (currentMillis - previousMillis < 1000) {
    digitalWrite(ledPin, LOW);
    Serial.println("LED is OFF");
    Serial.println("LED is OFF");
    Serial.println("LED is OFF");
} else{
    previousMillis = currentMillis;
}
}