该程序示范如何在操作系统环境下编写程序说明。在RTOS下，每个任务都（函数）

都可以是死循环，这些死循环内的代码在宏观上看是并发运行的，相当于将CPU

　　　　的运算资源分配给各个任务。程序中3个任务分别控制3只LED的闪烁，说明3个任

　　 务在宏观上是同时（并发）执行的。-This program shows how the operating system environment programming instructions. On RTOS, each task (function),

Can all be dead circulation, these dead circulation in the code within the concurrency is equivalent to the CPU

The computing resources to various tasks. Three tasks in the process control flashing LED 3 only, 3 tasks at the macro is also (concurrent).