#include <Stepper.h>

const int step_per_attc = 200;
Stepper Mystepper (step_per_attc,7,8,9,10);

void setup() {
Mystepper .setSpeed(50);//rpm =10
Serial.begin(9600);

}

void loop() {
Serial.println("attc Clockwise");//หมุนตามเข็ม
Mystepper.step(step_per_attc);
delay(1000);

Serial.println("attc antiClockwise");//หมุนทวนเข็ม
Mystepper.step(-step_per_attc);
delay(1000);

}