const float BETA = 3950;
int analogValue;
float Celsius;
const int a = 0;
const int b = 40;
void setup() {
Serial.begin(9600);
pinMode (A0, INPUT);
pinMode (3, OUTPUT);
pinMode (2, OUTPUT);
}

void loop() {
analogValue = analogRead(A0);
Celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;

if (Celsius <= a){
Serial.print("Temperature: ");
Serial.print(Celsius);
Serial.println("°C DANGER!!! COLD TEMPERATURE!!!");
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
}
else if (Celsius >= b){
Serial.print("Temperature: ");
Serial.print(Celsius);
Serial.println("°C DANGER!!! HOT TEMPERATURE!!!");
digitalWrite(3, HIGH);
digitalWrite(2, LOW);
}
else if (Celsius >= a && Celsius <=b){
Serial.print("Temperature: ");
Serial.print(Celsius);
Serial.println("°C");
digitalWrite(3, LOW);
digitalWrite(2, LOW);
}
delay(300);
}