//pins numbers to set
int PINS[] = {3, 4, 5, 6, 7};
unsigned long DELAY_IN_MS = 500;
unsigned long  mil = 0;

int pinsamount;
int pinset = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Setup...");

  //pins amount
  pinsamount = sizeof(PINS) / sizeof(PINS[0]);

  Serial.println("Pins amount:" + String(pinsamount));

  for (int i = 0; i < pinsamount; i++) {
    Serial.println("init PINS[" + String(i) + "]=" + String(PINS[i]));
    pinMode(PINS[i], OUTPUT);
  }

  Serial.println("Finish Setup");
  Serial.println("----- Start Loop ---------");
  mil = millis() + DELAY_IN_MS + 1;

}

void loop() {

  if ((millis() - mil) > DELAY_IN_MS) {
    mil = millis();
    Serial.print("pinset=");
    Serial.println(pinset, BIN);


    for (int bits = 0; bits < pinsamount; bits++) {
      int level = bitRead(pinset, pinsamount - bits - 1);
      Serial.print("PIN" + String(PINS[bits]) + "->" + String(level) + ";");
      digitalWrite(PINS[bits], level);
    }

    pinset++;
    if (pinset > pow(2, pinsamount)) pinset = 0;

    Serial.println();
    Serial.println("-----");

  }
}