unsigned long previousMillis1 = 0;
unsigned long previousMillis2 = 0;
const long interval1 = 1000;
const long interval2 = 500;

void setup() {
  Serial.begin(9600);
}

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

  if (currentMillis - previousMillis1 >= interval1) {
    previousMillis1 = currentMillis;
    task1();
  }

  if (currentMillis - previousMillis2 >= interval2) {
    previousMillis2 = currentMillis;
    task2();
  }
}

void task1() {
  Serial.println("Tugas 1 dieksekusi");
}

void task2() {
  Serial.println("Tugas 2 dieksekusi");
}