#include <Arduino_FreeRTOS.h>

typedef struct {
  int pin;
  TickType_t bright_period, dim_period;
} light_t;

static int pin_start = 9;
static int pin_end = 12;

static light_t light1 = {9, 1000, 1000};
static light_t light2 = {10, 200, 200};
static light_t light3 = {11, 200, 1000};

void task_blink(void *arg) {
  light_t *light = (int)arg;
  auto last_time = xTaskGetTickCount();
  while (true) {
    digitalWrite(light->pin, HIGH);
    vTaskDelayUntil(&last_time, light->bright_period / portTICK_PERIOD_MS);
    digitalWrite(light->pin, LOW);
    vTaskDelayUntil(&last_time, light->dim_period / portTICK_PERIOD_MS);
  }
}

void setup() {
  for (int i = pin_start; i < pin_end; i++) {
    pinMode(i, OUTPUT);
  }
  xTaskCreate(task_blink, "blink slowly", 64, (void *)&light1, 1, NULL);
  xTaskCreate(task_blink, "blink quickly", 64, (void *)&light2, 1, NULL);
  xTaskCreate(task_blink, "blink unevenly", 64, (void *)&light3, 1, NULL);
}

void loop() {
}