//code to create a 1 Hz pulse signal


void setup() {
  pinMode(13, OUTPUT);
  pinMode(10, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
  digitalWrite(10, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);                       // wait for a second
  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
  digitalWrite(10, LOW); 
  delay(900);                       // wait for a second
}