Compounds inhibiting neuronal nitric oxide synthase for potential treatment in neurodegenerative diseases, such as stroke, Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, such compounds of a formula. The frets are composed of a molded mixture including a higher proportion by volume of glass beads than resin, thereby providing abrasion resistant characteristics that are the same as or better than conventional steel frets. The encoder module encodes the pixel color datum by generating a bit indicative of the number of different pixel color data encoded since a datum having a same color as the pixel color datum was last encoded. Further, at least one of the first rail and the second rail is moved in a second direction to cause the lift cords to wind on the lift cord pulleys, with the lift cord pulley shaft rotating in an opposite direction.