#include <Plaquette.h>

    SineWave primary;   // Main heartbeat wave
    SineWave secondary; // Secondary beat
    AnalogOut led(9);   // LED for visualizing the heartbeat

    void begin() {
      primary.bpm(20); // Set primary beat to 80 beats per minute
      secondary.bpm(primary.bpm()); // Set secondary beat to same value
      secondary.phase(0.25); // Dephase secon
      secondary.amplitude(0.5); // Secondary beat is less strong
    }

    void step() {
      float combinedBeat = (primary.get() + secondary.get()) / 2.0; // Combine and normalize waves
      led.put(combinedBeat);        // Drive LED with combined signal
      print(primary); print(" ");        // Stream the combined wave for visualization
      print(secondary); print(" ");        // Stream the combined wave for visualization
//      println();
      println(combinedBeat);        // Stream the combined wave for visualization
    }