Stepper motor example for Arduino

const int in1 =  2;
const int in2 =  4;
const int in3 = 6;
const int in4 = 8;

const char stepperConfig[] = {
  1,0,0,0,
  1,1,0,0,
  0,1,0,0,
  0,1,1,0,
  0,0,1,0,
  0,0,1,1,
  0,0,0,1,
  1,0,0,1
};

int stepDelay = 1000;
int angle = 360;

void setup() {
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(in3, OUTPUT);
  pinMode(in4, OUTPUT);
}

void loop() {
  int angleSteps = angle*64/45;

  for(int i=0;i<angleSteps;i++){
    rotateCW();
  }

  delay(500);

  for(int i=0;i<angleSteps;i++){
    rotateCCW();
  }
  delay(500);

}

void doMotorStep(unsigned char stepNumber){
  unsigned char stepIndex = (stepNumber % 8) * 4;

  digitalWrite(in1, (stepperConfig[stepIndex]) ? HIGH : LOW);
  digitalWrite(in2, (stepperConfig[stepIndex+1]) ? HIGH : LOW);
  digitalWrite(in3, (stepperConfig[stepIndex+2]) ? HIGH : LOW);
  digitalWrite(in4, (stepperConfig[stepIndex+3]) ? HIGH : LOW);
  delayMicroseconds(stepDelay);
}

void rotateCW() {
  for (char i=0; i<8; i++){
    doMotorStep(i);
  }
}
void rotateCCW() {
  for (char i=7; i>=0; i--){
    doMotorStep(i);
  }
}