Contactless Door opening system

1int cm;
2int time;
3int e;
4#include<Servo.h>;
5Servo krish;
6void  setup()
7{
8  pinMode(13, OUTPUT);
9  pinMode(12, INPUT);
10  krish.attach(10);
11  Serial.begin(9600);
12  pinMode(11, OUTPUT);
13}
14//this will help people  to open doors without touch
15// price 500 for the arduino uno r3
16// price 300  for the servo motor
17// price 200 for the ultrasonic sensor
18// price 121 for  the breadboard
19// total 1121
20void loop()
21{
22  long Distance;
23  digitalWrite(13,  LOW);
24  delayMicroseconds(2);
25  digitalWrite(13, HIGH);
26  delayMicroseconds(5);
27  digitalWrite(13, LOW);
28  pinMode(12, INPUT);
29  time = pulseIn(12, HIGH);
30  cm = q (time);
31    if(cm < 100)
32    {
33      while(e<1)
34      {
35    krish.write (90);
36    analogWrite(11,255);
37    delay(1000);
38    krish.write  (0);
39    digitalWrite(11,LOW);
40    delay(2000);
41    e += 1 ;
42      }
43    }
44      else
45      {
46        e = 0;
47      } 
48  Serial.println(cm);
49  delay(10);
50}
51 long q (long w)
52{
53return w /2/29;
54}

1int cm;
2int time;
3int e;
4#include<Servo.h>;
5Servo krish;
6void
7  setup()
8{
9  pinMode(13, OUTPUT);
10  pinMode(12, INPUT);
11  krish.attach(10);
12
13  Serial.begin(9600);
14  pinMode(11, OUTPUT);
15}
16//this will help people
17  to open doors without touch
18// price 500 for the arduino uno r3
19// price 300
20  for the servo motor
21// price 200 for the ultrasonic sensor
22// price 121 for
23  the breadboard
24// total 1121
25void loop()
26{
27  long Distance;
28  digitalWrite(13,
29  LOW);
30  delayMicroseconds(2);
31  digitalWrite(13, HIGH);
32  delayMicroseconds(5);
33
34  digitalWrite(13, LOW);
35  pinMode(12, INPUT);
36  time = pulseIn(12, HIGH);
37
38  cm = q (time);
39    if(cm < 100)
40    {
41      while(e<1)
42      {
43
44    krish.write (90);
45    analogWrite(11,255);
46    delay(1000);
47    krish.write
48  (0);
49    digitalWrite(11,LOW);
50    delay(2000);
51    e += 1 ;
52      }
53
54    }
55      else
56      {
57        e = 0;
58      } 
59  Serial.println(cm);
60
61  delay(10);
62}
63 long q (long w)
64{
65return w /2/29;
66}