#include <AccelStepper.h>


// Define pin connections
const int dirPin = 8;
const int stepPin = 9;


// Define motor interface type
#define motorInterfaceType 1

// Creates an instance
//AccelStepper myStepper(motorInterfaceType, stepPin, dirPin);
AccelStepper myStepper(1, 9, 8);
const int stepsPerRevolution = 200; 
int pos=1000;


void setup() {

  // set the maximum speed, acceleration factor,
  // initial speed and the target position
  myStepper.setMaxSpeed(1000);
  myStepper.setAcceleration(25);
  myStepper.setSpeed(20 );
 // myStepper.moveTo(200);


}

void loop() {

//digitalWrite(2, HIGH);

if (digitalRead(3)==HIGH){
   //digitalWrite(13,LOW);
  // Set the target position:
  myStepper.moveTo(-800);
  // Run to target position with set speed and acceleration/deceleration:
   myStepper.runToPosition();

 
 } 
if (digitalRead(4)==HIGH){
if(digitalRead(2)==LOW){
   // myStepper.setCurrentPosition(0);
digitalWrite(2, HIGH);
}
}

    if (myStepper.distanceToGo() == 0)
  {
    delay(500);
    pos = -pos;
    myStepper.moveTo(pos);
    }
   

    while (digitalRead(2)==HIGH){
 myStepper.setSpeed(0);
myStepper.setCurrentPosition(0);
//myStepper.stop();
 } myStepper.run();
    }