short topRow = 3;
short btmRow = 2;
short aPin = A0;

short lock = 0; //defines the lock variable

void setup() {
  // put your setup code here, to run once:
  pinMode(topRow, INPUT_PULLUP);
  pinMode(btmRow, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int angle = analogRead(aPin);
delay(10);
//-------------------------------------------
if(angle < 490){
  if(digitalRead(topRow) == LOW){
    
    if(lock != 1){
      Serial.println("gear 1");
      lock = 1;
    }
  }

  if(digitalRead(btmRow) == LOW){
    
    if(lock != 2){
      Serial.println("gear 2");
      lock = 2;
    }
  }
}
//--------------------------------------------
if(530 > angle && angle > 490){
  if(digitalRead(topRow) == LOW){
    
    if(lock != 3){
      Serial.println("gear 3");
      lock = 3;
    }
  }

  if(digitalRead(btmRow) == LOW){
    
    if(lock != 4){
      Serial.println("gear 4");
      lock = 4;
    }
  }
}
//---------------------------------------------
if(570 > angle && angle > 530){
  if(digitalRead(topRow) == LOW){
    
    if(lock != 5){
      Serial.println("gear 5");
      lock = 5;
    }
  }

  if(digitalRead(btmRow) == LOW){
    
    if(lock != 6){
      Serial.println("gear 6");
      lock = 6;
    }
  }
}
//----------------------------------------------
if(angle > 570){
  if(digitalRead(topRow) == LOW){
    
    if(lock != 7){
      Serial.println("gear 7");
      lock = 7;
    }
  }

  if(digitalRead(btmRow) == LOW){
    
    if(lock != 8){
      Serial.println("gear R");
      lock = 8;
    }
  }
}
//----------------------------------------------
if(digitalRead(topRow) == HIGH && digitalRead(btmRow) == HIGH){ 
    if(lock != 0){
      Serial.println("gear N");
      lock = 0;
    }
  }
}