The present invention provides: luster coating film forming method I comprising applying an aqueous luster thermosetting base coating composition to a substrate in three to five stages, in such a manner that the thickness of the base coating composition applied in each of the second and subsequent stages becomes 0. The method includes decoding an instruction as a variable width, at least six-way addition instruction, where the variable width, at least six-way addition instruction includes a plurality of operands. The bracket, arrow catch, arrow guides, and spring member are arranged for: enabling the top arrow to pivot about the arrow guides and pass through the gap; releasing the top arrow when it pivots sufficiently to clear the arrow catch; and biasing the remainder of the stack against the arrow catch if the top arrow is released. The termination signal generator is suitable for receiving the first pulse signal during an enablement period of the first enablement signal to generate a first termination signal which is enabled when a predetermined signal among the first to fourth normal test signals is generated.