So start by placing out a platform you want the door on like this (does not have to be scale perfect!)

Then add 1 bearing in the corner like this:

And then add a pipe on top of the bearing, and then a bearing on that pipe, like this:
Here's all the bearings on display:

Then place your door on top of that like this (does not need to be scale perfect once again):

Start by placing two controllers like this, (for the sake of the guide i put them on display):

After that, set up the controllers like this:
Controller 1:

Controller 2:

After that set up two switches however you want, i put mine like this:

And this:

And then hook it all up like this:

And this: