#include <Servo.h>

const int triggerPin = 8;
const int echoPin = 7;
Servo ser;

void setup() {
  ser.attach(22);
  Serial.begin(9600);
  
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {

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

  
  int duration = pulseIn(echoPin, HIGH);

  
  int cm = duration * 0.034 / 2;

 
  Serial.print("Distance: ");
  Serial.print(cm);
   
  if (cm >200) {
    ser.write(180);
    delay(1000);
  } else {
    ser.write(45);
    delay(1000);
  }
}