void setup() {
  // put your setup code here, to run once:
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9,OUTPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  int data = analogRead(A0);
  Serial.println("");
  Serial.print("NTC sensor ");
  Serial.print("value ");
  Serial.print(data);
  delay(1000);
  // for -24 celsius
  if(data >=900)
  {
    digitalWrite(13,HIGH);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);

  }
  // betw 0 to -24 celsius 
  if( data >= 750 && data < 900){
    digitalWrite(12,HIGH);
    digitalWrite(13, HIGH);
    digitalWrite(11, LOW);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);
  }
  // betw 20 to 0 celsius
  if( data >= 570 && data < 750){
    digitalWrite(11, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(13, HIGH);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);
  }
  // betw 40 to 20 celsius
  if(data >= 300 && data < 570 && data !=523){
    digitalWrite(10, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(13, HIGH);
    digitalWrite(9, LOW);
  }
  // above 50 celsius
  if(data >=0 && data< 300){
    digitalWrite(9, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(10,HIGH);
    digitalWrite(13, HIGH);
  }
  delay(10);

}