const int DIR = 8 ; // board driver
const int STEP = 9 ; // board driver
const int step_per_attc= 125;

void setup() {
  Serial.begin(115200);
  pinMode(DIR, OUTPUT);
  pinMode(STEP, OUTPUT);

}

void loop()   {
digitalWrite(DIR, HIGH);
Serial.println("ATTC Motor Clockwise");// ตามเข็มนาฬิกา

for (int i=0;  i < step_per_attc ;i++  ) {
  digitalWrite(STEP, HIGH);
  delayMicroseconds(10000);
  digitalWrite(STEP, LOW);
  delayMicroseconds(10000);

}
delay(1000);

digitalWrite(DIR, LOW);
Serial.println("ATTC Motor AntiClockwise");// ทวนเข็มนาฬิกา

for (int i=0;  i < step_per_attc ;i++  ) {
  digitalWrite(STEP, HIGH);
  delayMicroseconds(10000);
  digitalWrite(STEP, LOW);
  delayMicroseconds(10000);

}
delay(1000);

}