Arduino Push-Button & LED

gunvarrel 0.0.1

/*
 * Gunvarrel v 0.0.1
 * Purpose: To emulate simple sonar robot
 * Description: Far from perfect. I use LED instead of motor, and push-button instead of sonar
 * Author: Go Frendi Gunawan
 */
int left_motor   = 12;  // left motor (now just LED)
int right_motor  = 13;  // right motor (now just LED)
int sonar_sensor = 8;   // sonar (now just push-button)

void setup(){
  Serial.begin(9600);
  pinMode(left_motor,   OUTPUT);
  pinMode(right_motor,  OUTPUT);
  pinMode(sonar_sensor, INPUT );
}

void straight(){
  digitalWrite(left_motor,  HIGH);
  digitalWrite(right_motor, HIGH);
  delay(100);
}

void turn(){
  digitalWrite(left_motor, LOW);
  digitalWrite(right_motor, HIGH);
  delay(100);
}
void loop(){
  int obstacle_detected = digitalRead(sonar_sensor);
  Serial.println(obstacle_detected);
  if(obstacle_detected == HIGH){
    turn();
  }else{
    straight();
  }
}