const int sensorPn = A0;
const float baselineTemp = 20.0:
void setup(){
  serial.begin(9600); 
  for(int pinNumber = 2; pinNumber<5;pinMumber++){
    pinMode(pinNumber, OUTPUT);
    digitalWrite(pinNumber, LOW;
  }
}
void loop() {
 int sensorVal = analogRead(sensorPin);
Serial.print("Sensor Value: ");
Serial. print (sensorVal); 
//convert the ADCreading to voltage
foat voltage = (sensorVal/1024.0) * 5.0;
Serial.print(", Volts: ");
Serial.print(voltage);
Serial.print("degreed C: ");
// convert the voltage to temperature in degrees
float temperature = (voltage - .5) *100;
serial.print1n(temperature);
if(temperature < baselineTemp+2){
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);