A method for creating faded designs in selected areas of fabric includes providing a plurality of fabric pieces and placing at least one cord on at least one selected area of at least one fabric piece of the plurality of fabric pieces in accordance with a selected pattern. Sample arrays of a multitude of nucleic acid sites are processed in multiple cycles to add nucleotides to the material to be sequenced, detect the nucleotides added to sites, and to de-block the added nucleotides of blocking agents and tags used to identify the last added nucleotide. A rotating rear lever similarly incorporates a trailing protrusion facing the slot and a shank slidably coupled to an elongated groove in the front lever, such that the two levers rotate together.