const int redLedPin = 7;
const int yellowLedPin = 6;
const int greenLedPin = 5;
const int tempSensorPin = A0;

void setup() {
  pinMode(redLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int temperature = analogRead(A0);
  Serial.print("Temperature: ");
  Serial.println(temperature);
  if (temperature == 115) {
    digitalWrite(redLedPin, HIGH);   
    digitalWrite(yellowLedPin, LOW);  
    digitalWrite(greenLedPin, LOW); 
  } else if (temperature <= 136) {
    digitalWrite(redLedPin, LOW);  
    digitalWrite(yellowLedPin, HIGH);  
    digitalWrite(greenLedPin, LOW);  
  } else if (temperature <= 523) {
    digitalWrite(redLedPin, LOW);     
    digitalWrite(yellowLedPin, LOW); 
    digitalWrite(greenLedPin, HIGH);  
  } else {
    digitalWrite(redLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(greenLedPin, LOW);
  }
  delay(500);
}

int readTemperature() {
  int rawValue = analogRead(tempSensorPin);
  float voltage = (rawValue / 1024.0) * 5.0;
  float temperature = (voltage - 0.5) * 100;
  return (int)temperature; 
}