#include <Stepper.h>

int cont = 0;
const int passos = 200;
Stepper motor(passos, 8, 9, 10, 11);

void setup()
{
  pinMode(7, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);
  motor.setSpeed(60);
  Serial.begin(9600);
}

void loop()
{
  int hor = digitalRead(7);
  int ant = digitalRead(6);
  if (hor == LOW && ant == HIGH)
  {
    passos = 200;
    cont = 1;
  }
  if (ant == LOW && hor == HIGH)
  {
    passos = 200;
    cont = 0;
  }
  if (ant == LOW && hor == LOW)
  {
    passos = 0;
  }
  
   Serial.print("cont = ");
  Serial.println(cont);
  
  Serial.print("hor = ");
  Serial.println(hor);
  
  Serial.print("ant = ");
  Serial.println(ant);
  
  switch(cont)
  {
    case 0:
      motor.step(passos);
      delay(250);
      break;
    case 1:
      motor.step(-passos);
      delay(250);
    break;
  }
}