int ledpin=13; 
void setup()
{
  pinMode(ledpin, OUTPUT);
}
  void loop()
{
  digitalWrite(ledpin,HIGH);
  delay(1000);
  //wait for 1second turn off led
  digitalWrite(ledpin, LOW);
  delay(1000);// wait for 1second

  // put your setup code here, to run once:



pinMode(ledpin, OUTPUT);

}