Ultrasonic Rangefinder with Processing

1import processing.serial.*;  
2Serial myPort;  
3String data=""  ;
4PFont  myFont;  
5void setup()
6{
7size(1366,900); // size of processing  window
8background(0);// setting background color to black
9myPort = new Serial(this,  "COM3", 9600);
10myPort.bufferUntil('\n');
11}
12void draw()
13{
14  background(0);
15  textAlign(CENTER);
16  fill(255);
17  text(data,820,400);
18  textSize(100);
19  fill(#4B5DCE);
20  text("              Distance :        cm",450,400);
21   noFill();
22   stroke(#4B5DCE);
23}
24void serialEvent(Serial myPort)
25{
26  
27  data=myPort.readStringUntil('\n');
28}

1#include <Mouse.h>
2const int trigpin= 8;
3const int echopin= 7;
4long  duration;
5int distance;
6void setup()
7{
8  pinMode(trigpin,OUTPUT);
9  pinMode(echopin,INPUT);
10  Serial.begin(9600);
11 
12}
13void loop()
14{
15  digitalWrite(trigpin,HIGH);
16  delayMicroseconds(10);
17  digitalWrite(trigpin,LOW);
18  duration=pulseIn(echopin,HIGH);
19  distance = duration*0.034/2;
20  Serial.println(distance);
21}

1import processing.serial.*;  
2Serial myPort;  
3String data=""
4  ;
5PFont  myFont;  
6void setup()
7{
8size(1366,900); // size of processing
9  window
10background(0);// setting background color to black
11myPort = new Serial(this,
12  "COM3", 9600);
13myPort.bufferUntil('\
14');
15}
16void draw()
17{
18  background(0);
19
20  textAlign(CENTER);
21  fill(255);
22  text(data,820,400);
23  textSize(100);
24
25  fill(#4B5DCE);
26  text("              Distance :        cm",450,400);
27
28   noFill();
29   stroke(#4B5DCE);
30}
31void serialEvent(Serial myPort)
32{
33
34  
35  data=myPort.readStringUntil('\
36');
37}

1#include <Mouse.h>
2const int trigpin= 8;
3const int echopin= 7;
4long
5  duration;
6int distance;
7void setup()
8{
9  pinMode(trigpin,OUTPUT);
10
11  pinMode(echopin,INPUT);
12  Serial.begin(9600);
13 
14}
15void loop()
16{
17
18  digitalWrite(trigpin,HIGH);
19  delayMicroseconds(10);
20  digitalWrite(trigpin,LOW);
21
22  duration=pulseIn(echopin,HIGH);
23  distance = duration*0.034/2;
24  Serial.println(distance);
25}