int ledPin = 0;
unsigned long currentTime, previousTime;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  currentTime = millis();

  if (currentTime - previousTime >= 60000) {
    previousTime = currentTime;
    digitalWrite(ledPin, HIGH);
  }
  if (currentTime - previousTime >= 30000) {
    previousTime = currentTime;
    digitalWrite(ledPin, LOW);
  }
  if (currentTime - previousTime >= 60000) {
    previousTime = currentTime;
    digitalWrite(ledPin, HIGH);
  }
  if (currentTime - previousTime >= 60000) {
    previousTime = currentTime;
    digitalWrite(ledPin, LOW);
  }
  if (currentTime - previousTime >= 30000) {
    previousTime = currentTime;
    digitalWrite(ledPin, HIGH);
  }
  if (currentTime - previousTime >= 60000) {
    previousTime = currentTime;
    digitalWrite(ledPin, LOW);
  }
}