int count = 0;
int lastclk = HIGH;

void setup() {
  for(int i = 2; i <= 11; i++){
    pinMode(i, OUTPUT);
  }
  pinMode(12, INPUT);
  pinMode(13, INPUT);
}

void loop() {
  int newclk = digitalRead(12);
  if(newclk != lastclk){
    int newdt = digitalRead(13);
    if(newclk == 0 && newdt == 1){
      count++;
      for(int i = 2; i <= count+1; i++){
        digitalWrite(i, HIGH);
        delay(100);
      }
    }else if(newclk == 0 && newdt == 0){
      count--;
      for(int i = 2; i <= count+1; i++){
        digitalWrite(i, HIGH);
        delay(100);
      }
    }
  }


}