#include <Stepper.h>

const int start = 2;
const int direction = 3;

volatile bool IsSpinnig = false;
volatile bool IsClockwise = true;

const int stepsPerRevolution = 200;
Stepper myStepper(stepsPerRevolution, 10, 11, 12, 13);


int TurnSide(){
  if(IsClockwise){
    return 1;
  }
  else if(!IsClockwise){
    return -1;
  }
  return 0;
}

void setup() {
  Serial.begin(9600);

  myStepper.setSpeed(100);

  pinMode(start, INPUT_PULLUP);
  pinMode(direction, INPUT_PULLUP);
  attachInterrupt(0, ChangeDirection, FALLING);
  attachInterrupt(1, StartStop, FALLING);

}

void loop()
{
  if (IsSpinnig)
  {    
    myStepper.step(stepsPerRevolution / 100 * TurnSide());
  }
}

void StartStop(){
  IsSpinnig = !IsSpinnig;
}

void ChangeDirection(){
  IsClockwise = !IsClockwise;
}