const float beta=3950;
int reading;
float v;
float temp;
int yellow=12; int green=8; int red=2;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(yellow, OUTPUT);pinMode(green, OUTPUT);pinMode(red, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
reading=analogRead(A4);
v=reading*(5.0/1024.0);
temp=1 / (log(1 / (1023. / reading - 1))/beta + 1.0 / 298.15) - 273.15;
Serial.print("Sensor Reading");
Serial.println(reading);
Serial.print(v);
Serial.println("v");
Serial.print("The temperature is");
Serial.print(temp);
Serial.println("Celcius");
delay(3000);
if(temp>30){
  Serial.println("The tempture  is high" );
  digitalWrite(green, LOW);
  digitalWrite(yellow, LOW);
  blink:
  digitalWrite(red, HIGH);
  delay(100);
  digitalWrite(red, LOW);
  delay(100);
  goto blink;

}
else if(temp>=25){
  Serial.println("The tempture is optimum");
  digitalWrite(red, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(green, HIGH);
  delay(100);
  digitalWrite(yellow, LOW);
  
}
    else {
      Serial.println("The tempture is low");
      digitalWrite(red, LOW);
      digitalWrite(green, LOW);
      digitalWrite(yellow, HIGH);
      delay(100);
      digitalWrite(yellow,LOW);
      delay(100);
      
  
    }
    delay(300);
}