long previousMillis = 0;
long stoptime = 2000;
unsigned long currentMillis = millis();
int led = 13;
int ledstate = LOW;
void setup(){
  Serial.begin(9600); // Debug will be disabled in final versions
  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);
  delay(5000);
}

void loop(){
  previousMillis = currentMillis;
  if(ledstate == LOW){
  Serial.println("Turning on LED, Lets see if it turns off in 2 seconds");
  digitalWrite(led, HIGH);
  ledstate = HIGH;
  }

  else if(currentMillis - previousMillis > stoptime) {
    Serial.println("Timer has expired, Turning off LED");
    digitalWrite(led, LOW );
  }
}