#include <Ultrasonic.h>
#include <Servo.h>

//ultrasonic sensor 
int ultraTrigPin=11;
int ultraEchoPin=10;
Ultrasonic ultrasonic(ultraTrigPin, ultraEchoPin);
int distance;

//servo
int servoPin=9;
Servo servo1;

void setup() {
  // put your setup code here, to run once:
  servo1.attach(servoPin);
  
  // start the monitor so we can view the distance 
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:

  distance = ultrasonic.read(CM);
  Serial.print("Distance in CM: ");
  Serial.println(distance);
  if (distance <= 50){
    servo1.write(0);
  }
  else if (distance <= 100){
    servo1.write(90);
  }
  else{
    servo1.write(180);
  }
  delay(1000);


  



}