My processes include scanning the keypad and looking for a command pattern for a specific sequence of pressing of buttons on keypad, looking activity from sensors and do work when any of them get activated, manage your cyrun process so that syrun is ON for a specific time, Manage time for exit or entry from exit doors, scanning specific button if they get activated do some work, Managing the LCD displays and to make thing worst there is a piece of code which simulate a clock and which is supposed to give a accurate time of the day with date.