#define LED_ON        LOW
#define LED_OFF       HIGH

byte led_red = 13, led_green = 12, led_yellow = 11, led_blue = 10;

// defines pins numbers
const int stepPin = 5;
const int dirPin = 4;

uint16_t speed[3] = {30000, 10000, 3000};

void setup() {
  digitalWrite(stepPin, LOW);
  digitalWrite(dirPin, HIGH);

  digitalWrite(led_red, LED_OFF);
  digitalWrite(led_green, LED_OFF);
  digitalWrite(led_yellow, LED_OFF);
  digitalWrite(led_blue, LED_OFF);

  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);

  pinMode(led_red, OUTPUT);
  pinMode(led_green, OUTPUT);
  pinMode(led_yellow, OUTPUT);
  pinMode(led_blue, OUTPUT);
}

void loop() {
  while(1)
  {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(speed[0]);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(speed[0]);
  }
}