An Interesting Remote Control

The garage remote control at the place where I work is really interesting.

Unsurprisingly, its name is remocon. Its front features of four unlabeled white buttons and an unlabeled LED. Every time I press a button the garage door behaves in a nondeterministic way: it moves up, stops moving, or moves down. I am not sure why four buttons are needed to control that type of movement. Thankfully, on the back of the control is a self-adhesive label with clear instructions explaining what each of the four unlabeled buttons does.

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