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-1.4determines vertical gap between rows based on width, perfectly centers rows around Y=0, complements the "go to" blockblock executes all at once

2430adds final brick, with length calculated by subtracting the gap length from half the length of a regular brick, perfectly matches the end with Row B

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KBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECByxcQFpoRMBzwAAAABJRU5ErkJggg==