Room Automation with Multiple Starters

1char data=0;
2const int trigPin = 10;
3const int echoPin = 11;
4const  int k=13;
5// defines variables
6long duration;
7int distance=100;
8int  inputVal=0,c=0;
9void setup() 
10{
11  // put your setup code here, to r
12  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
13pinMode(echoPin,  INPUT); 
14
15pinMode(k,OUTPUT);
16  Serial.begin(38400);
17}
18
19void loop()  
20{
21  
22
23 
24   if(Serial.available() > 0)      
25   {
26      data  = Serial.read();        
27      Serial.print(data);          
28      Serial.print("\
29");        
30      if(data == '1')              
31           digitalWrite(k, HIGH);    
32      else if(data == '0')         
33           digitalWrite(k, LOW);   
34   }
35digitalWrite(trigPin, LOW);
36delayMicroseconds(2);
37// Sets the  trigPin on HIGH state for 10 micro seconds
38digitalWrite(trigPin, HIGH);
39delayMicroseconds(10);
40digitalWrite(trigPin,  LOW);
41// Reads the echoPin, returns the sound wave travel time in microseconds
42duration  = pulseIn(echoPin, HIGH);
43// Calculating the distance
44distance= abs(duration*0.034/2);
45
46  if(distance<10 )
47  {
48    ++c;
49    if(c%2==1)
50    {
51    digitalWrite(k,HIGH);
52    delay(3000);
53    }
54    else
55    {
56     digitalWrite(k,LOW);
57     delay(3000); 
58    }
59  }
60  delay(1000);
61}