bool x = 0, y = 0;


void setup() {

  Serial.begin(115200);
  delay(1000);
  Serial.println("Uno ready to go...");
  // put your setup code here, to run once:

}

void loop() {

  uint8_t num = random(0, 4);
  x = bitRead(num, 0);
  y = bitRead(num, 1);
  if (!x && !y) Serial.println("First argument");

  else if (!x && y) Serial.println("Second argument");

  else if (x && !y) Serial.println("Third argument");

  else if (x && y) Serial.println("Fourth argument");

  delay(1000);

  }