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In this chapter we turn ten LEDs into a flowing light bar. We start with the basic Freenove example, then improve it with a sine-harmonic timing table to create a realistic Cylon scanner effect. All code is written in Ada and runs on the RP2040 without floating-point at runtime.

In this chapter I combine a push button with an LED. We start with basic on/off control, then move to a toggle-style table lamp with software debounce.