Oxygen Not Included - Gas Compressor Door logic tutorial. (Automation works as of patch 420700.)
EDIT: The Automation Innovation update added automation inputs to the vents; you may need to reroute your wires.
Explanation starts about a minute in; I rant for a bit.
Timers explanations at about three minutes in: Buffer 1 - 4s, Buffer 2- 6s, Buffer 3 -8s, Filter 1 - 6s, Buffer 4 - 3s, Filter 2 - 8s
Sorry that there are a million videos explaining this. I've watched several and no one explains the door logic concisely.
I'm uploading this as MKV... don't know if YouTube will mix the audio properly.