To open the gates you spark the PSCN square, and to close it you spark the NSCN square.
The farther right the buttons are, the lower the gate opens. If gate does not open, spark the NSCN square below for a couple seconds, then try again. If the switch does not turn off, reload the simulation.

Future updates to this might be: More buildings, gates will ALWAYS open and close, better storage, making the switches bigger, and making gates bigger.

You may make this better, but please give credit to me.