//int pin[] = {2,5,6,7,10,11};
int pin[10]; 
//int RND = random(2,12);
int tombelemszama = sizeof(pin) / sizeof(int);
void setup() {
  for(int i = 0; i < tombelemszama; i++){
  pinMode(i, OUTPUT);
  }
  Serial.begin(115200);
}

void loop() {

  for(int i = 0; i < tombelemszama; i++){
    pin[i] = random(2,12);
    digitalWrite(pin[i],HIGH);
    delay(500);
    digitalWrite(pin[i],LOW);
  }
  /*for(int i = 0; i < tombelemszama; i++){
    digitalWrite(pin[i], HIGH);
    delay(500);
  }
  for(int i = tombelemszama-1; i > -1; i--){
    digitalWrite(pin[i], LOW);
    delay(500);
  }*/
}