When the button that is sticking out is pressed, the hidden one is pushed out.
About this creation
This here is the left side of the machine. As you can see, there is a "U" on this side. This stands for Useless.
Here is the right side. There's an "M" which stands for Machine
The interior of the machine. As you can see, there's a lever mechanism in the machine that makes it work. This is what it looks like when the bottom button is pressed.
What it looks like when the top button is pressed.
If you want a machine that does something useful, than go look elsewhere, because this machine is not useful. You could even say that it's useless. It took me about an hour or more to make this and I like it. It's fun to just press the buttons sometimes, I'm not sure why. Probably because I'm easily amused. As ususal, comments are welcome.