Blink of an eye

Blink of an eye

One of the pillars has been built out with a extra side.You can
see inside the extension through a hole where you confront
the gaze of your eye in a mirror. In the periphery of the field
of vision can you see a nail that oscillates towards the mirror
and threaten the image of your eye. The back of the pendulum
is constructed like a lid in the same size as the peep-hole. In
the second that the nail hits the mirror the lid appear between
the spectator gaze and the mirror. The nail