int myRand(int low, int high) {
  static int r = random(low, high);

  int r_ = random(low, high - 1);
  if (r_ >= r) {
    r_++;
  }
  r = r_;

  return r;
}


unsigned long counts[9];

void setup() {
  Serial.begin(115200); Serial.println();
  randomSeed(analogRead(A0));
  for (unsigned long i = 0; i < 900000; i++) counts[myRand(0, 9)]++;

  for (byte i = 0; i < 9; i++) {
    Serial.print(i);
    Serial.write('\t');
    Serial.println(counts[i]);
  }
}

void loop() {}