// OBSTACLES CODE BY SOLIDARITYNOW //


//define Pins
#include <Servo.h>

Servo servo;

int trigPin = 9;
int echoPin = 8;

// defines variables
long duration;
int distance;

void setup() 
{
  servo.attach(7);
  servo.write(0);
 delay(2000);
  
// Sets the trigPin as an Output
pinMode(trigPin, OUTPUT);
// Sets the echoPin as an Input 
pinMode(echoPin, INPUT);
// Starts the serial communication 
Serial.begin(9600); 
}
void loop() 
{
  
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

// Calculating the distance
distance= duration*0.034/2;

// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
if ( distance <= 25   ) // Change Distance according to Ultrasonic Sensor Placement
 {

servo.write(0);
delay(3000);
 } 
else 
{
servo.write(300);

 }

}
