seatsavailable = 100
INPUT seat
IF seat = 0 THEN:
	seat = 1
	Colour = Cyan
	seatsavailable = seatsavailable – 1
	add seat to list
ELSE:
	seat = 0
	Colour = Magenta
	seatsavailable = seatsavailable + 1
	remove seat from list
ENDIF
OUTPUT seatsavailable
OUTPUT list