#define sensorPin  A0
#define redPin 8
#define greenPin 9
#define bluePin 10

void setup() {
  Serial.begin(9600);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  int analogValue = analogRead(sensorPin);
  float voltage = analogValue * (5.0 / 1023.0);
  float temperatureC = voltage * 100;
  if (temperatureC < 20) {
    analogWrite(redPin, 0);
    analogWrite(greenPin, 0);
    analogWrite(bluePin, 255);
  } else if (temperatureC >= 20 && temperatureC < 40) {
    analogWrite(redPin, 0);
    analogWrite(greenPin, 255);
    analogWrite(bluePin, 0);
  } else {
    analogWrite(redPin, 255);
    analogWrite(greenPin, 0);
    analogWrite(bluePin, 0);
  }
  Serial.print("Analog Value: ");
  Serial.print(analogValue);
  Serial.print(" | Voltage: ");
  Serial.print(voltage);
  Serial.print(" V | Temperature: ");
  Serial.print(temperatureC);
  Serial.println(" °C");
  delay(500);
}