Handsfree Liquid Handwash Dispenser

1#include <Servo.h>
2/*contains 
3 * attach()
4 * write()
5 * writeMicroseconds()
6  * read()
7 * attached()
8 detach()*/
9#define trigPin 3
10#define echoPin  2
11
12
13Servo servo1;
14Servo servo2;
15int sound = 250;
16
17void setup()  
18    {
19        Serial.begin (9600);
20        pinMode(trigPin, OUTPUT);
21        pinMode(echoPin, INPUT);
22        servo1.attach(4);
23        servo2.attach(5);
24    }
25void loop() 
26    {
27        long duration, distance;
28        digitalWrite(trigPin,  LOW);
29        delayMicroseconds(2);
30        digitalWrite(trigPin, HIGH);
31        delayMicroseconds(10);
32        digitalWrite(trigPin, LOW);
33        duration  = pulseIn(echoPin, HIGH);
34        distance = (duration/2) / 29.1;
35        if  (distance < 5) 
36            {
37                Serial.println("the distance  is less than 5, dettol liquid dispensed");
38                servo1.write(100);
39                /*will rotate servo1 to 100degress clockwise*/
40                servo2.write(100);
41                /*will rotate servo2 to 100degress clockwise*/
42            }
43        else  
44            {  
45                servo1.write(0);
46                servo2.write(0);
47                /*no effect on the two servos*/
48            }
49        if (distance  > 60 || distance <= 0)
50            {
51              Serial.println("The distance  is more than 60, move your hand closer");
52            }
53        else 
54            {
55              Serial.print(distance);
56              Serial.println("  cm");
57            }
58      delay(500);
59}