Hi Larry,
What you want is in chapter 22 of "Model Railroading, Prepared by the Staff of the Lionel Corporation" from the 1958 Bantam book, chapter titled "Wring for Effect" pages 353-355, from the 5th edition. No relays or special circuits, just insulated rail sections and switches (turnouts) wired together. Clever and simple!
Take care, Joe.
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