int count=0;
int temp;

void setup()
{
  pinMode(1, INPUT);
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}

void loop()
{ 
  if(digitalRead(3) == HIGH){
    if(count == 80){
      count = 80; 
    }else if(count == 40){
   	  count = 40;
      upward();
    }else{
      count = 80;
      upward();
    }
    digitalWrite(8, LOW);
  	digitalWrite(9, LOW);
   	digitalWrite(10, HIGH);
  }else if(digitalRead(2)==HIGH){
    if(count == 80){
      count = 40;	
      downward();
    }else if(count == 40){
      count = 40;
  	}else{
      count = 40;
   	  upward();
    }
   	digitalWrite(8, LOW);
   	digitalWrite(9, HIGH);
   	digitalWrite(10, LOW);
  }else if(digitalRead(1) == HIGH){
    if(count==80){
    	count += 80;
      	downward();
    } else if(count == 40){
    	count = 40;
      	downward();
    }else{
    	count = 0;	
    }
    count = 0;
    digitalWrite(8, HIGH);
   	digitalWrite(9, LOW);
   	digitalWrite(10, LOW);
    
  }
}
void upward()
{
  for(int i = 0; i < count; i++)
  {
  	delay(500);
    temp = digitalRead(7);
    digitalWrite(7, digitalRead(4));
    digitalWrite(4, digitalRead(5));
    digitalWrite(5, digitalRead(6));
    digitalWrite(6, temp);
  }
}
void downward()
{
  for(int i = 0; i < count; i++)
  {
  	delay(500);
    temp = digitalRead(7);
    digitalWrite(7, digitalRead(6));
    digitalWrite(6, digitalRead(5));
    digitalWrite(5, digitalRead(4));
    digitalWrite(4, temp);
  }
}