#include <Stepper.h>
const int stepsPerRevolution = 400;

Stepper stepper(stepsPerRevolution, 8, 9, 10, 11);
int trigger = 7;
int echo = 6;
float dist=0;
int led = 12;

void setup() {
  stepper.setSpeed(90);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);


}

void loop() {
  digitalWrite(trigger, LOW);
  delayMicroseconds(5);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);
    
  dist = pulseIn(echo, HIGH);
  dist = dist/58;
  Serial.print("distancia= ");
  Serial.print(dist);
  Serial.println(" cm");


  if (dist>60){
    stepper.step(stepsPerRevolution);
    digitalWrite(led, LOW);
  }

  else{
    digitalWrite(led, HIGH);
    delay(100);
  }

}