#define blue 2
#define green 3
#define red 4

const float BETA = 3950; // should match the Beta Coefficient of the thermistor

void setup() {
  Serial.begin(9600);
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);  
  pinMode(red, OUTPUT);
} 

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

  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");

  if (celsius >= 35) {
    Serial.println("Temperature: HIGH");
    digitalWrite(blue, LOW);
    digitalWrite(green, LOW);
    digitalWrite(red, HIGH);
  } else if (celsius >= 25 && celsius < 35) {
    Serial.println("Temperature: Normal");
    digitalWrite(blue, LOW);
    digitalWrite(green, HIGH);
    digitalWrite(red, LOW);
  } else {
    Serial.println("Temperature: LOW");
    digitalWrite(blue, HIGH);
    digitalWrite(green, LOW);
    digitalWrite(red, LOW);
  }

  delay(1000);
}