Here is a list of all documented files with brief descriptions:

hal.c	This file consists hardware-depended functions
hal.h	This file consists hardware-depended calls interface
main.c	This file consists initialization and main cycle
mood_logic.c	This file consists mood lamp logic
mood_logic.h	This file consists mood lamp logic parameters and interface
xorshift.c	This file consists random number generator
xorshift.h	This file consists random number generator interface