int led_pins[8] = {2,3,4,5,6,7,8,9};
int d = 500,lr = 1;
int count = 128;

void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  for(int i = 0;i<7;i++){
    pinMode(led_pins[i],OUTPUT);
  }
  pinMode(10,INPUT);
  pinMode(11,INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.write(count);
  for(int i = 0;i<7;i++){
      if(((count >> i) %2) ==1){
        digitalWrite(led_pins[i],HIGH);
      }
      else{
        digitalWrite(led_pins[i],LOW);
      }
    }
   if(digitalRead(9) == LOW){
    lr *= -1;
    Serial.write("aa");
   }
   if(lr == 1){
    if(count==1){
      count = 128;
    }else
      count >>= 1;
   }else{
    if(count == 128)
      count == 1;
    else
      count <<= 1;
   }

   if(digitalRead(8) == HIGH){
    d = 200;
   }
   delay(d);
   d = 500;


}