51开发板中第一个程序点亮第一个led，运行程序后会自动点亮第一盏小灯(The first program in the development board lights the first led, and the first light is automatically lit when the program is run)

51开发板中第2个程序点亮所有led，运行程序后会自动点亮所有小灯(The second program in the development board lights up all the leds, and the running program automatically lights up all the small lights)

51开发板中第3个程序循环流水灯，运行程序后会自动点亮所有小灯并闪烁(The 3rd program in the development board is circulating the running water lamp, which will automatically light all the small lights and blink when the program is running)

51开发板中第4个程序蜂鸣器，运行程序后会自动打开蜂鸣器并发声(The fourth program buzzer in the development board, which will automatically turn on the buzzer and make a sound after running the program)