Программа для горения разных ламп в зависимости от освещенности

void setup()
{
  pinMode(A0, INPUT);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  Serial.begin(9600);
}
int a;
void loop()
{
  a = analogRead(A0);
    Serial.println(a);
  
  if (a>344, a<456)
  {
  
  digitalWrite(8, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  }
  else if (a>456, a<568)
  {
  digitalWrite(8, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, HIGH); 
  }
  else if (a>568, a<680)
  {
  digitalWrite(8, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH); 
  }
  else if (a>680, a<792)
  {
  digitalWrite(8, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);
  }
  else if (a>792, a<904)
  {
  digitalWrite(8, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH); 
  }
  else if (a>904, a<1017)
  {
  digitalWrite(8, HIGH);
  digitalWrite(13, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);
  }
}