To make this you need to hook up a repeating device and then hook it to the door, also make sure to have a button on each side or you can make it need an item to open. Wire it to the door and the button to the device and make it run.
Put this in community made guides. If it is help, people think you are asking how to make one. Also, this is a really short guide. Maybe add some pictures?
Nice first guide! I suggest adding steps and pictures to make it more clear.
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