int red = 11;
int green = 10;
int blue = 9;

int pin = A2;
int reading = 0;
float volt;
float temp;

int min = 60;
int max = 300;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  reading = analogRead(pin);
  volt = reading * 5 / 1024;
  temp = (volt - 0.5) * 100;
  Serial.print("temperatura ");
  Serial.println(temp);
  delay(500);

  if (temp < min){
    digitalWrite(blue, HIGH);
    delay(1000);
    digitalWrite(blue, LOW);
    delay(500);
  }else 
      {
        if (temp > max){
          digitalWrite(red, HIGH);
          delay(1000);
          digitalWrite(red, LOW);
          delay(500);
        }
        else{
          digitalWrite(green, HIGH);
          delay(1000);
          digitalWrite(green, LOW);
          delay(500);
        }
      }
}