Analog temperature sensor

int RedLED=2;
int BlueLED=3;

void setup() {

Serial.begin(9600);
pinMode(RedLED, OUTPUT);
pinMode(BlueLED, OUTPUT);
}

void loop() {

int Temp=analogRead(A0);
Serial.println(Temp);
delay (100);

if (Temp<450){
  digitalWrite(RedLED,HIGH);

}
  else {
   if (Temp>550){
     digitalWrite(BlueLED,HIGH);
   }
    else {
      digitalWrite(RedLED,LOW);
      digitalWrite(BlueLED,LOW);
    }

}
}