const int START_LED = 2;
const int END_LED = 8;
const float DELAY = .3 * 1000;


void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  for (int i = START_LED; i <= END_LED; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  for (int i = 0; i < 128; i++) {
    int num = i;
    Serial.print(i);
    Serial.print("  ");
    for (int j = 6; j >= 0; j--) {
      if (num - pow(2,j) >= 0) {
        digitalWrite(START_LED + j, HIGH);
        Serial.print("1");
        num -= pow(2,j);
      } else {
        Serial.print("0");
        digitalWrite(START_LED + j, LOW);
      }
    }
    Serial.println();
    delay(DELAY);
  }

}