Sorry i have been a while replying - my idea was kind of like this:
I am working in servo states i.e. door down, door up, screen down, screen up. These positions are set by the control circuit and can be easilky fine tuned using variable resistors to set the end point.
Each orange flash represents a switch to change the control state.
MASTER SWITCH OPEN STATE:
O1: Door up, screen down
O2: Door up, screen up
O3: Door down, screen open
MASTER SWITCH CLOSED STATE:
C1: Door up, screen up
C2: Door up, screen down
C3: Door down, screen down
I hope a flowchart and animation are a thousand million words! I have never been the best at expaining things in text (something i need to sort out before writing up my PhD) as i am a true engineer and love to design stuff and hate to explain.