const float BETA = 3950;
int analogValue;
float temperatureC;
int blueled=10;
int redled=11;

void setup() {
  Serial.begin(9600);
  pinMode(blueled, OUTPUT);
  pinMode(redled, OUTPUT);
}
void loop() {
  analogValue = analogRead(A0);
  temperatureC = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
 
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.print(" °C");

  if(temperatureC <= 0){
    digitalWrite(blueled, HIGH);
    digitalWrite(redled, LOW);
     Serial.println(" DANGER!!! COLD TEMPERATURE!!!");
  }
  else if(temperatureC >=40 ){
    digitalWrite(blueled, LOW);
    digitalWrite(redled, HIGH);
    Serial.println(" DANGER!!! HOT TEMPERATURE!!!");
  }
  else if(temperatureC <=39 && temperatureC >=1){
    digitalWrite(blueled, LOW);
    digitalWrite(redled, LOW);
    Serial.println("");
  }
  delay(1000);
}