Reddit arduino stepper led blinker v1.0

/*
   Reddit arduino help --- May 26, 2019
  Version 1.0

  ???

  Blink a LED and run a stepper motor manually at the same time, but at different blink rates.

*/

// I dunno what pin 8 is for???

// int stepper_motor_1_enable_pin = x; // normally you would have three pins for each stepper motor...
// int stepper_motor_1_direction_pin = y;
int stepper_motor_1_step_pin = 9;

// Below is timing code variables for stepper_motor_1
bool stepper_motor_1_enabled = true; // This lets you turn the motor on or off some other way in code.
int stepper_motor_1_state = 0;
int stepper_motor__step_interval = 50; // This is the milliseconds time for the stepper motor pin to blink [on] or [off]. It uses the same time for on and off.
unsigned long stepper_motor_1_begin_time = 0;
unsigned long stepper_motor_1_current_time = 0;


bool led_blinker_enabled = true; // This lets you turn the blinking led on or off some other way in code.
int led_blinker_state = 0;
int led_blinker__blink_on_time = 50; // This is the time that the LED will blink on, in milliseconds.
int led_blinker__blink_off_time = 950; // This is the time that the LED will blink off, in milliseconds.
int led_blinker__time_in_use = 0;
unsigned long led_blinker_begin_time = 0;
unsigned long led_blinker_current_time = 0;



void setup() {

  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(stepper_motor_1_step_pin, OUTPUT);
  digitalWrite(8, LOW);
  digitalWrite(stepper_motor_1_step_pin, LOW);

}



void loop() {

  if (led_blinker_enabled == true) {
    check_led_blinker();
  }

  if (stepper_motor_1_enabled == true) {
    check_stepper_motor_1();
  }

} // end of main loop()




void check_led_blinker() {
  led_blinker_current_time = millis();
  if (led_blinker_current_time >= led_blinker_begin_time) {
    if (led_blinker_state == 0) { // if the LED is currently turned off:
      led_blinker__time_in_use = led_blinker__blink_off_time;
    }
    else { // if the LED is currently turned on:
      led_blinker__time_in_use = led_blinker__blink_on_time;
    }
    if (led_blinker_current_time >= (led_blinker_begin_time + led_blinker__time_in_use)) {
      if (led_blinker_state == 0) {
        led_blinker_state = 1;
      }
      else {
        led_blinker_state = 0;
      }
      digitalWrite(LED_BUILTIN, led_blinker_state);
      led_blinker_begin_time = millis();
    }
  }
  else {
    led_blinker_begin_time = millis();
  }
}



void check_stepper_motor_1() {
  stepper_motor_1_current_time = millis();
  if (stepper_motor_1_current_time >= stepper_motor_1_begin_time) {
    if (stepper_motor_1_current_time >= (stepper_motor_1_begin_time + stepper_motor__step_interval)) {
      if (stepper_motor_1_state == 0) {
        stepper_motor_1_state = 1;
      }
      else {
        stepper_motor_1_state = 0;
      }
      digitalWrite(stepper_motor_1_step_pin, stepper_motor_1_state);
      stepper_motor_1_begin_time = millis();
    }
  }
  else {
    stepper_motor_1_begin_time = millis();
  }
}



// -the end-