int lm_35=A3;
int ledr=13;
int ledg=12;
int ledy=11;

void setup() 
{
  pinMode(lm_35, INPUT);
  pinMode(ledr, OUTPUT);
  pinMode(ledg, OUTPUT);
  pinMode(ledy, OUTPUT);
  Serial.begin(9600);
}

void loop() 
{
  int temp_adc;
  float temp;
  temp_adc=analogRead(lm_35);
  temp=temp_adc*4.88;
  temp=temp/10;
  Serial.println("Temperature=");
  Serial.println(temp);
  Serial.println("Degree Celsius");
  delay(1000);

  if(temp>300)
  {
    digitalWrite(ledr, HIGH);
    digitalWrite(ledg, LOW);
    digitalWrite(ledy, LOW);
    Serial.println("Temperature is cool");
    delay(1000);
  }
  else if (100<temp<300)
  {
    digitalWrite(ledr, LOW);
    digitalWrite(ledg, HIGH);
    digitalWrite(ledy, LOW);
    Serial.println("Temperature is moderate");
    delay(1000);
  }
  else
  {
    digitalWrite(ledr, LOW);
    digitalWrite(ledg, LOW);
    digitalWrite(ledy, HIGH);
    Serial.println("Temperature is hot");
    delay(1000);
  }
}