A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. Boot data is stored in a plurality of different blocks. Formulating the visual scene also includes accessing a geometry, which includes a container, a binding definition, and an arrangement definition. An indicator wheel is disposed in the housing so that a portion of the indicator wheel is visible through the window, wherein pivoting of the shoe member relative to the housing causes the indicator wheel to rotate.