void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
  pinMode( 13, OUTPUT); //output led
  digitalWrite( 13, HIGH);
  delay(0);
  digitalWrite( 13, LOW);
  delay(0);

pinMode( 2, OUTPUT); // switch on/off
digitalWrite( 2, HIGH);
digitalWrite( 13, LOW);
}