int i = 0;
int valor;
double temp;
void setup()
{
  Serial.begin(9600);
  pinMode(A0, INPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop()
{
  valor=analogRead(A0); //
  temp = valor * 5.0 * 100.0 / 1024.0;
  analogRead(temp);
    Serial.println(temp);
  if (temp < 30) { //temp del líquido 55
    analogWrite(5, 0);
    analogWrite(6, 255);
    analogWrite(7, 255);
    analogWrite(3, 255);
} else {
    if (temp > 33) {//temp del liquido 62
      analogWrite(5, 255);
      analogWrite(6, 255);
      analogWrite(7, 0);
      analogWrite(3, 0);
    } else {
      if (temp >= 30) {//temp del liquido 58
        analogWrite(5, 255);
        analogWrite(6, 0);
        analogWrite(7, 255);
      }
    }
  }
  delay(500); // Delay a little bit to improve simulation performance
}