int temp=40;  //variable to hold temperature 
int redLED=12;  //variable to hold LED pin 

void setup() {
  // put your setup code here, to run once:
pinMode(redLED, OUTPUT); //redLED pin configured as an output pin 
}

void loop() 
{
  // put your main code here, to run repeatedly:
  // if the temperature is larger than 35 on the red LED 

if(temp>35) 
  {
  digitalWrite(redLED, HIGH); 
  delay(500); 
  temp = 40;
  }
else{
  digitalWrite(redLED, LOW);  
  delay(500);
  temp = 20;
  }
}