BlinkySketch

int ledPin=13;
int delayTime=690;
void setup()
{
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  void flash();
{
  digitalWrite(ledPin, HIGH);
  delay(delayTime);
  digitalWrite(ledPin, LOW);
  delay(delayTime);
}
void serialPing()
{
  serial.println("LED is on.");
  delay(delayTime);
  serial.println("LED is off .");
  delay(delayTime);
}