< ‘files/2013_note/’
> ‘files/2013/’
< ‘files/2013_note/ncku_embedded_course/’
> ‘files/2013/ncku_embedded_course/’
< ‘files/2013_note/ncku_embedded_course/blink_led.png’
> ‘files/2013/ncku_embedded_course/blink_led.png’