microcontroller PIC

Create an assembly application for the pic microcontroller to operate a digital lock on a storage container/unit. You should design your application using an appropriate method (flowchart/pseudo code) and then implement this on PICSIM board 1. The specification of what is required is as follows:  You will use two buttons (RA1 and RA2) to cycle up and down the 16 codes available, and use a third button (RA3) to select that code. You will display the code as an LED bit pattern on portB (bits 0:3).  If the code is the same with a predefined password when selected you will open the lock (shown by turning on the RA0 LED).  To close the lock, you will need to set the correct code then press the OK button (RA3) again, also turning off RA0.  If the lock is open, you can change the password by selecting a new code using the up and down buttons then pressing RA4.