We have to automate six lights and a lock of a room. The room has six enclosures

and requirements are as follows:

Capacity of room is $16$ people

Seat plan is shown above and user entering the room will sit on next

available seat starting from seat no$.1$

Only person at seat $1$ can exit the room and on his exit all the people will

move to previous seat

The room should be able to display the number of people inside

If all the seats in an enclosure are vacant then its light will be turned off

If the room is full its Entry door will be locked and the exit door will be locked

if there is no one in the room