https://medium.com/jungletronics/mini-prussirinha-printer-d616dde8ae46

_78_mini_prussurinha_01.ino

                           // Motor x-Axis
int Red = 14;               // Firing order for  4-Wire Micro-step Motor
int Brown = 15;             // First Brown coil
int Yellow = 16;            // Then Yellow coil and so on...
int Orange = 10;
                            // Motor y-axis
//  int Red = 2;            // Firing order for 28BYJ-48 Stepper Motor
//  int Brown = 3;          // First Brown coil
//  int Yellow = 4;         // Then Yellow coil and so on...
//  int Orange = 5;

long del = 500000;          // 50.000 (+SPEED) -> 999.000 (-SPEED)// ABOVE this figure the motor will stall:/

void setup() {
  pinMode(Red, OUTPUT);
  pinMode(Brown, OUTPUT);
  pinMode(Yellow, OUTPUT);
  pinMode(Orange, OUTPUT);

  for (int e = 0; e <= 5; e++) {
    //for (int i = 0; i <= 40; i++) {
    for (int i = 0; i <= 35; i++) {
      phaseOne();
      phaseTwo();
      phaseThree();
      phaseFour();
    }
    //for (int j = 0; j <= 40; j++) {
    for (int j = 0; j <= 35; j++) {
      phaseFour();
      phaseThree();
      phaseTwo();
      phaseOne();

    }
  }
}

void phaseOne() {
  digitalWrite(Red, LOW);
  digitalWrite(Brown, HIGH);
  digitalWrite(Yellow, HIGH);
  digitalWrite(Orange, LOW);
  delayMicroseconds(del);
}
void phaseTwo() {
  digitalWrite(Red, LOW);
  digitalWrite(Brown, HIGH);
  digitalWrite(Yellow, LOW);
  digitalWrite(Orange, HIGH);
  delayMicroseconds(del);
}
void phaseThree() {
  digitalWrite(Red, HIGH);
  digitalWrite(Brown, LOW);
  digitalWrite(Yellow, LOW);
  digitalWrite(Orange, HIGH);
  delayMicroseconds(del);
}
void phaseFour() {
  digitalWrite(Red, HIGH);
  digitalWrite(Brown, LOW);
  digitalWrite(Yellow, HIGH);
  digitalWrite(Orange, LOW);
  delayMicroseconds(del);
}
void motorOff() {
  digitalWrite(Red, LOW);
  digitalWrite(Brown, LOW);
  digitalWrite(Yellow, LOW);
  digitalWrite(Orange, LOW);
}

                            // the loop routine runs over and over again forever:
void loop() {
   for (int e = 0; e <= 5; e++) {
    //for (int i = 0; i <= 40; i++) {
    for (int i = 0; i <= 35; i++) {
      phaseOne();
      phaseTwo();
      phaseThree();
      phaseFour();
    }
    //for (int j = 0; j <= 40; j++) {
    for (int j = 0; j <= 35; j++) {
      phaseFour();
      phaseThree();
      phaseTwo();
      phaseOne();

    }
  }
 

}