/*
  Starts with 15 flashes, then
  turns on an LED on for five seconds,
  then off for five seconds, repeatedly.

  modified 20 July 2024
  by Manfred
 */

int StartCount = 0;

void setup() {
  // initialize all ports
  pinMode (1, INPUT_PULLUP);
  pinMode (2, INPUT_PULLUP);
  pinMode (3, INPUT_PULLUP);
  pinMode (4, INPUT_PULLUP);
  pinMode (5, INPUT_PULLUP);
  pinMode (6, INPUT_PULLUP);
  pinMode (7, INPUT_PULLUP);
  pinMode (8, INPUT_PULLUP);
  pinMode (9, INPUT_PULLUP);
  pinMode (10, INPUT_PULLUP);
  pinMode (11, INPUT_PULLUP);
  pinMode (12, INPUT_PULLUP);
  pinMode (13, OUTPUT);
  pinMode (14, INPUT_PULLUP);
  pinMode (15, INPUT_PULLUP);
  pinMode (16, INPUT_PULLUP);
  pinMode (17, INPUT_PULLUP);
  pinMode (18, INPUT_PULLUP);
  pinMode (19, INPUT_PULLUP);

  do {
    digitalWrite (13, HIGH);
    delay(250);
    digitalWrite(13, LOW);
    delay(500);
    StartCount ++;
  }
  while (StartCount < 15);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(5000);              // wait for a second
  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
  delay(5000);              // wait for a second
}