A drill bit direction system and method is disclosed that modifies or biases the stochastic movement of the drill bit andor stochastic interactions between the drill bit and an inner-wall of a borehole being drilled by a drilling system to change the direction of drilling of the drilling system. One can easily fasten its handle onto lever of toilet flushing unit. A plurality of gates is formed on the SOI substrate. The mask is, for example, circular, and is aligned with an optical axis Z0 as the center.