//FreeRTOS library:
#include <Arduino_FreeRTOS.h>
//Variables for buzzer & first 3 LEDs!
 
const int LED1 = 8;      //Red LED
const int LED2 = 9;      //Yellow LED
const int LED3 = 10;     //Green LED
 

void setup() {
  Serial.begin(9600);
  //LEDs' initialization!
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
   

   

  /*
    Create 3 tasks with labels 'Task_1', 'Task_2' and 'Task_3' and
    assign the priority as 1, 2 and 3 respectively.
  */
  //'Neutral_Task' - the task-free function!
  xTaskCreate(Task_1, "Task no. 1!", 100, NULL, 1, NULL);
  xTaskCreate(Task_2, "Task no.  2!", 100, NULL, 2, NULL);
  xTaskCreate(Task_3, "Task no.  3!", 100, NULL, 3, NULL);
  xTaskCreate(Task_4, "Empty Task!", 100, NULL, 0, NULL); 
}

//The following function is Task1. We display the task label on Serial monitor.
static void Task_3(void* pvParameters) {
  while (1) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
     
    Serial.println(F("Task no. 1!"));
    vTaskDelay(1000 / portTICK_PERIOD_MS);
  }
}

//Task 2
static void Task_2(void* pvParameters) {
  while (1) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);
     
    Serial.println(F("Task no. 2!"));
    vTaskDelay(1100 / portTICK_PERIOD_MS);
  }
}

//Task 3
static void Task_1(void* pvParameters) {
  while (1) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
     
     
    Serial.println(F("Task no. 3!"));
    vTaskDelay(1200 / portTICK_PERIOD_MS);
  }
}
//Task 4
static void Task_4(void* pvParameters) {
  while (1) {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
     
     
    Serial.println(F("Empty Task!"));
    vTaskDelay(1300 / portTICK_PERIOD_MS);
  }
}


//We don't need to use "loop" function here!
void loop() {}