const int ledPin1 = D2;
const int ledPin2 = D3;

 const unsigned long interval1 = 1000; 
const unsigned long interval2 = 500;   

 unsigned long previousMillis1 = 0;
unsigned long previousMillis2 = 0;

 bool ledState1 = LOW;
bool ledState2 = LOW;

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

void loop() {
   unsigned long currentMillis = millis();

   if (currentMillis - previousMillis1 >= interval1) {
     previousMillis1 = currentMillis;
     ledState1 = !ledState1;
     digitalWrite(ledPin1, ledState1);
  }

   if (currentMillis - previousMillis2 >= interval2) {
     previousMillis2 = currentMillis;
     ledState2 = !ledState2;
     digitalWrite(ledPin2, ledState2);
  }
}