int echo =  9;
int trigger = 10; 
int DirPin = 12;
int StepPin = 13;
int lmp = 5;

void setup() {
  pinMode(DirPin, OUTPUT);
  pinMode(StepPin, OUTPUT);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(lmp, OUTPUT);

}

void loop() {

  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);

  int duration = pulseIn(echo, HIGH);
  int cm = duration * 0.034 / 2;


  if(cm < 200){
  digitalWrite( DirPin, HIGH);  
  for(int i = 0 ; i < 200 ; i++){
    digitalWrite(lmp , HIGH);
    digitalWrite( StepPin, HIGH);  
    digitalWrite( StepPin, LOW); 
    delay(5);  // 5 * 200 = 1 second // 
  }
  delay(1000);
  }
  
 else{
  digitalWrite( DirPin, LOW);  
  for(int i = 0 ; i < 200 ; i++){
    digitalWrite(lmp , LOW);
    digitalWrite( StepPin, HIGH);  
    digitalWrite( StepPin, LOW); 
    delay(5);  // 5 * 200 = 1 second // 
   }
   delay(1000);
 }

}