File content as of revision 0:7f7fa5e631ec:

// http://www.radekdostal.com/content/freertos-610-minimal-example

#include "mbed.h"
#include "FreeRTOS.h"
#include "task.h"

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

void Task1 (void* pvParameters)
{       
    (void) pvParameters;                    // Just to stop compiler warnings.   
    for (;;) {
        vTaskDelay(500);
        led1 = !led1;
        printf("Task A\n");
        vTaskDelay(500);
    }
}

void Task2 (void* pvParameters)
{
    (void) pvParameters;                    // Just to stop compiler warnings.
    for (;;) {
        led2= !led2;
        printf("Task B\n");
        vTaskDelay(5000);
    }
}

int main (void)
{
    xTaskCreate( Task1, ( signed char * ) "TaskA", configMINIMAL_STACK_SIZE, NULL,
        tskIDLE_PRIORITY, ( xTaskHandle * ) NULL );
    xTaskCreate( Task2, ( signed char * ) "TaskB", configMINIMAL_STACK_SIZE, NULL, 
        tskIDLE_PRIORITY, ( xTaskHandle * ) NULL );

    vTaskStartScheduler();

   //should never get here
   printf("ERORR: vTaskStartScheduler returned!");
   for (;;);
}