#include <Stepper.h>

const int stepsPerRevolution = 200; 
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
int button = 13;
String ready = "";
int prevMillis = millis();

void setup() {
  myStepper.setSpeed(60);
  Serial.begin(9600);
  pinMode(button, INPUT);
}

void loop() {
  
  if(digitalRead(button) == HIGH){
    if(ready == "start"){
      ready = "clock";
    }else{
      ready = "anticlock";
    }
    prevMillis = millis();
  }

  if(ready == "clock"){
    int currentMillis = millis();
    if(currentMillis - prevMillis < 2000){
       myStepper.step(-stepsPerRevolution);
    }else{
      ready = "";
    }
  }
  
  if(ready == "anticlock"){
    int currentMillis = millis();
    if(currentMillis - prevMillis < 2000){
       myStepper.step(stepsPerRevolution);
    }else{
      ready = "start";
    }
  }
}