// https://forum.arduino.cc/t/use-metronome-in-mozzi/1111957
// https://wokwi.com/projects/361300417746421761

int myBeats[64];

void setup() {
  Serial.begin(115200);
  Serial.println("Euclidean World!");
  Serial.println();

  int theLength = 13;
  int theStep = 4;

  fillBeat(myBeats, theLength, theStep);
  for (int ii = 0; ii < theLength; ii++)
    Serial.print(myBeats[ii]); Serial.print(" ");

  Serial.println();
  Serial.println();
  delay(777);
}

unsigned long nexttick;
unsigned int speed0 = 777;
unsigned int speed1 = 1300;

void loop() {

// blink without delay pattern 0:

  unsigned long timenow = millis();
 
  if (timenow >= nexttick) {
    nexttick = millis() + speed0;
    
    Serial.println("ZERO");
  }

// blink without delay pattern 1:

  static unsigned long lastTime; 
  unsigned long now = millis();
  
  if (now - lastTime >= speed1) {
    lastTime = now;

  	//  do stuff periodically (every speed0 milliseconds)
    Serial.println("          ONE");
  }
}

int fillBeat(int beat[], int len, int step) {
  int ii, jj, kk;
  kk = (-1 * step) % len;
  for (ii = 0; ii < len; ii++) {
    kk = jj;
    jj = (ii * step) % len;
        beat[ii] = jj <= kk;
//    if (jj > kk) beat[ii] = 0;
//    else if (jj <= kk) beat[ii] = 1;
  }
}