#include <Servo.h>
#define servoPin  11
Servo s;

#define led 13

#define echo 2
#define tring 3

void setup() {
  // put your setup code here, to run once:
s.attach(servoPin);

pinMode(led, OUTPUT);

pinMode(echo, INPUT);
pinMode(tring, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  
float resultOfDistance = readDistanceInCm();

if(resultOfDistance<=30){
  s.write(90);
  delay(1000);
  digitalWrite(led, HIGH);
  s.write(0);
  delay(10000);
  s.write(90);
  delay(1000);
  digitalWrite(led, LOW);
}
if(resultOfDistance>30&&resultOfDistance<=60){
  digitalWrite(led, HIGH);
  delay(1000);
  digitalWrite(led, LOW);
  delay(1000);
  digitalWrite(led, HIGH);
  delay(1000);
  s.write(45);
  delay(5000);
  s.write(90);
  digitalWrite(led, LOW);
}
else{
  digitalWrite(led, LOW);
  s.write(90);
}
 
}

float readDistanceInCm(){

  digitalWrite(tring, LOW);
  delayMicroseconds(2);
  digitalWrite(tring, HIGH);
  delayMicroseconds(10);
  digitalWrite(tring, LOW);
  int durationTime= pulseIn(echo,HIGH);// for time measurement
    return durationTime*0.034/2;

}