const int ledPin1 = 23;  // Pin for the first LED
const int ledPin2 = 22;  // Pin for the second LED

unsigned long previousMillis1 = 0;  // will store last time LED1 was updated
unsigned long previousMillis2 = 0;  // will store last time LED2 was updated

const long interval1 = 1000;  // interval at which LED1 blinks (milliseconds)
const long interval2 = 2000;  // interval at which LED2 blinks (milliseconds)

void setup() {
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}

void loop() {
  // Get the current time
  unsigned long currentMillis = millis();

  // Check if it's time to blink LED1
  if (currentMillis - previousMillis1 >= interval1) {
    // Save the last time LED1 was blinked
    previousMillis1 = currentMillis;

    // Toggle the state of LED1
    if (digitalRead(ledPin1) == HIGH) {
      digitalWrite(ledPin1, LOW);
    } else {
      digitalWrite(ledPin1, HIGH);
    }
  }

  // Check if it's time to blink LED2
  if (currentMillis - previousMillis2 >= interval2) {
    // Save the last time LED2 was blinked
    previousMillis2 = currentMillis;

    // Toggle the state of LED2
    if (digitalRead(ledPin2) == HIGH) {
      digitalWrite(ledPin2, LOW);
    } else {
      digitalWrite(ledPin2, HIGH);
    }
  }
}