Outside temperature monitor using Arduino Nano

/* Temperature indication using 3 LEDs
 *  alerts for dangerous road conditions
 *  Arduino NANO code
 *  15-09-2021 by Procyon78
 */

const int sensorPin = A0;
// reference temperature, degrees Celcius
const float baselineTemp =4.0;

void setup() {
  // open a serial connection to display values
  Serial.begin(9600);
  // set the LED pins as outputs
  // pin D2 = green LED
  pinMode(2,OUTPUT);
  // pin D3 = yellow LED
  pinMode(3,OUTPUT);
  //pin D4 = blueLED
  pinMode(4,OUTPUT);
   }

void loop() {
  // read the value on AnalogIn pin 0 and store it in a variable
  int sensorVal = analogRead(sensorPin);

  // send the 10-bit sensor value out the serial port
  Serial.print("sensor Value: ");
  Serial.print(sensorVal);

  // convert the ADC reading to voltage
  float voltage = (sensorVal / 1024.0) * 5.0;

  // Send the voltage level out the Serial port
  Serial.print(", Volts: ");
  Serial.print(voltage);

  // convert the voltage to temperature in degrees C
  // the sensor changes 10 mV per degree
  // the datasheet says there's a 500 mV offset
  // ((voltage - 500 mV) times 100)
  Serial.print(", degrees C: ");
  float temperature = (voltage - 0.5) * 100;
  Serial.println(temperature);

 // measured temperature is 4 degrees or above = green LED on
 if (temperature >= baselineTemp){
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);

 // measured temperature is between 0 and 4 degrees = yellow LED on
} else if (temperature >= baselineTemp-4 && temperature < baselineTemp){
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);

 // measured temperature is lower than 0 degrees = blue LED on
} else if (temperature < baselineTemp-4){
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
  }
    
  delay(1000);
}