STM32 & FreeRTOS task scheduling - task

Question

I need to run three tasks in order of priority
/* Definitions for myTask01 */
osThreadId_t myTask01Handle;
const osThreadAttr_t myTask01_attributes = {
.name = "myTask01",
.stack_size = 512 * 4,
.priority = (osPriority_t) osPriorityLow,
};
/* Definitions for myTask02 */
osThreadId_t myTask02Handle;
const osThreadAttr_t myTask02_attributes = {
.name = "myTask02",
.stack_size = 512 * 4,
.priority = (osPriority_t) osPriorityNormal,
};
/* Definitions for myTask03 */
osThreadId_t myTask03Handle;
const osThreadAttr_t myTask03_attributes = {
.name = "myTask03",
.stack_size = 512 * 4,
.priority = (osPriority_t) osPriorityHigh,
};
The tasks simply blink the PA5 led
void StartTask02(void *argument) //Normal priority
{
for(;;)
{
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
osDelay(2000);
}
osThreadTerminate(NULL);
}
Of course, in the main, the tasks are created and the scheduler is initialized and started.
When I run the firmware, only the third task run (it has a faster blinking).
If I put this for in the third task
void StartTask03(void *argument) //High priority
{
for(int i=0;i<50;i++)
{
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
osDelay(100);
}
osThreadTerminate(NULL);
}
it blinks when is in for loop, and when it exits from the for loop, the led stops blinking.
How can I run the other tasks? Thanks