A laser alignment system comprises a rod, a casing removably couplable with respect to the rod, and a laser positioned within the casing. The pattern includes a repeating pattern region and a pattern-interrupting region adjacent to the repeating pattern region. One or more frame members are attached within the window opening. Alternatively, the transparent display may be disposed in or behind an aperture in the front surface of the home appliance. The interface allows the user to then make further changes to the design, or synthesize the design into a register transfer level file. Each spot contains a microelectrode system for the impedance spectroscopic detection of binding events occurring between the catcher molecules and target molecules of an analyte solution applied to the spots.