void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(3, INPUT);
  pinMode(4, INPUT);
  pinMode(5, INPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  digitalWrite(2, false);
  digitalWrite(8, false);
  digitalWrite(9, false);
  digitalWrite(10, false);
  digitalWrite(11, false);
}

unsigned long itr{};
bool state = false;

void loop() {
  // put your main code here, to run repeatedly:
  //__asm__ __volatile__("nop");
  if (nanos >= 41.667)
  {
    state = !state;
    digitalWrite(2, state);
    digitalWrite(8, digitalRead(3));
    digitalWrite(9, digitalRead(4));
    digitalWrite(10, digitalRead(5));
    itr = 0;
  }
  ++itr;
}

// 0 0 1
// 0 1 0
// 0 1 1
// 1 0 0
// 1 0 1
// 1 1 0
// 1 1 1

// T_itr - okres itr
// 11 * T_itr ~= 1s posedge [13]
// 11 * T_itr ~= 1 / (pow(2, 14) * 2)
// 11 * T_itr ~= 1 / pow(2, 15)
// T_itr ~= 1 / (pow(2, 14) * 11)
// f / (2 ^ 14 * 10) ~= 1 Hz
// f ~= 2 ^ 14 * 10
// f ~= 2 ^ 14 * 10
// f ~= 7281.78