GO! 55221 Storm at Sea 12inch. The GO! Storm at Sea 12 finished die is a Block on Board (BOB) die. It cuts a repeating three-color 12 block in one pass through your cutter, with no template, special ruler or paper piecing required. The die uses the much-requested 60-degree diamond in a rectangle for its sashing. Piecing features and step-by-step sewing instructions mean your quilting project will come together quick as lightning. Fat Quarter-Friendly