Motor shield advice request

Using Arduino Motors, Mechanics, Power and CNC
7

Thanks everyone.

I have been trying several things with my sketches and I have developed a very simple program that I think will meet my needs. Also, maybe I failed to let you guys know that I already have an Arduion UNO R3 and an Arduino motor shield R3. I have been having a real struggle trying to remember ANY of the C++ programming language that I used to know so well. Trying to remember things is like trying to walk on two rubber legs after my stroke. Sometimes I feel totally useless.

My needs for the motor control are as follows -

  1. Run motor CW for 18 seconds
  2. Stop motor (without break)
  3. Pause 14 hours
  4. Run motor CCW for 18 seconds
  5. Stop motor (without break)
  6. Pause 10 hours
    That's it. I know it may seem simple to you but I'm struggling. As you will see in my sketch below, I'm using nano-seconds for my timing commands. I'm pretty sure there is a better way to program lengthy MOTOR OFF periods but I simply cannot remember. Any advise would be appreciated.

Anyway here is my sketch: (please comment on ways to simplify or to streamline - thanks)
// Drive a simple DC motor forward and backward at full
// speed with timed pause between each run. 2/24/2013
//
// Motor connected to Motor output A on Arduino Motor Shield R3

// Motor A definitions
int DIR_A = 12;
int SPEED_A = 3;
int BREAK_A = 9;

// Motor B definitions
int DIR_B = 13;
int SPEED_B = 11;
int BREAK_B = 8;

void setup()
{
pinMode(SPEED_A, OUTPUT);
pinMode(DIR_A, OUTPUT);
pinMode(BREAK_A, OUTPUT);

// release break
digitalWrite(BREAK_A, LOW);
}

void loop()
{
// run motor backward full speed. (Max is 250)
digitalWrite(DIR_A, HIGH);
analogWrite(SPEED_A, 250);

// run motor for 18 seconds to open door
delay(18000);

// stop motor
analogWrite(SPEED_A, 0);

// pause door open 14 hours (minus run time)
delay(50398200);

// run motor forward full speed. (Max is 250)
digitalWrite(DIR_A, LOW);
analogWrite(SPEED_A, 250);

// run motor for 18 seconds to close door
delay(18000);

// stop motor
analogWrite(SPEED_A, 0);

// pause door closed 10 hours (minus run time)
delay(35998200);

}