byte LED1_PIN = 13;
byte LED2_PIN = 18;

void task1(void *pt){
  byte LED_PIN1 = *(byte *) pt;
  pinMode(LED_PIN1, OUTPUT);
  while(1){
    digitalWrite(LED_PIN1, !digitalRead(LED_PIN1));
    vTaskDelay(500);
  }
}

void task2(void *pt){
  byte LED_PIN = *(byte *) pt;
  pinMode(LED_PIN, OUTPUT);
  while(1){
    digitalWrite(LED_PIN, !digitalRead(LED_PIN));
    vTaskDelay(3000);
  }
}

void setup() {
  Serial.begin(9600);
  
  if(xTaskCreate(task1,
                  "blink11",
                  1024, 
                  (void *)&LED1_PIN, 
                  1,
                  NULL) == pdPASS)
    Serial.println("task 1 created.");
  
  if(xTaskCreate(task2,
                  "blink12",
                  1024, 
                  (void *)&LED2_PIN, 
                  1,
                  NULL) == pdPASS)
    Serial.println("task 2 created.");

}

void loop() {
}