30-seconds-per-hour-timer_ver_1

/*
   This is an Arduino Uno sketch that turns on pin #12
   for 30 seconds, once (approximately) every hour.
   It also blinks pin 13 once every second [for .1 seconds on]
   to indicate that the program is actually running properly.
*/


void setup() {
  // put your setup code here, to run once:
  pinMode(12, OUTPUT); // Pin #12 is for controlling the motor relay.
  pinMode(13, OUTPUT); // Pin #13 is just for blinking the pin-13 LED.
}

void loop() {
  // 59.5 minute delay:
  for (int x = 0; x < 119; x++) {
    // 59 minutes / 30 seconds = 118, + 30 more seconds = 119
    thirty_second_delay();
  }
  // turn pin 12 on:
  digitalWrite(12, HIGH);
  // 30 second delay:
  thirty_second_delay();
  // turn pin 12 off:
  digitalWrite(12, LOW);
}

void thirty_second_delay() {
  for (int y = 0; y < 29; y++) {
    one_second_delay();
  }
}

void one_second_delay() {
  digitalWrite(13, HIGH);
  delay(100);
  digitalWrite(13, LOW);
  delay(900);
}