#include <Servo.h>
Servo robot_aram;
int t=10;
int e=9;
int time;
int d;
int buzzer=11;
void setup() {
  robot_aram.attach(3);
  pinMode(t, OUTPUT);
  pinMode(e, INPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);

  // put your setup code here, to run once:

}

void loop() {
  digitalWrite(t, LOW);
  delayMicroseconds(2);
  digitalWrite(t, HIGH);
  delayMicroseconds(10);
  digitalWrite(t, LOW);
  time = pulseIn(e,HIGH);
  d = (time * 0.034) /2;
  if(d<=50)
  {
    robot_aram.write(0);

    Serial.println(d);
    delay(1000);
  }
  else if(d>50 and d<300)
  {
   robot_aram.write(45);
   delay(1000);
   robot_aram.write(90);
   delay(1000);
   robot_aram.write(135);
   delay(1000);
   robot_aram.write(180);
   delay(1000);
   robot_aram.write(135);
   delay(1000);
   robot_aram.write(90);
   delay(1000);
   robot_aram.write(45);
   delay(1000);
   robot_aram.write(0);
   tone(buzzer, HIGH);
   Serial.println(d);
   delay(1000);
  }
  

}