Arduino Code for ultrsonic RADAR

Micocontroller,  ROBOTICS,  Arduino Uno Board Project Example fro School and Science exibiation and College Projects.

#define echoPin 7
#define trigPin 8
#define LEDPin 13
int relay1=2;
int relay2=3;
int relay3=4;
int relay4=5;
int maximumRange = 200;
int minimumRange = 0;
long duration, distance;

void setup() {
 Serial.begin (9600);
 pinMode(trigPin, OUTPUT);
 pinMode(echoPin,  OUTPUT);
  pinMode(relay1,  OUTPUT);
   pinMode(relay2,  OUTPUT);
    pinMode(relay3,  OUTPUT);
     pinMode(relay4, OUTPUT);
}

void loop() {

 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);

 digitalWrite(trigPin, LOW);
 duration = pulseIn(echoPin, HIGH);


 distance = duration/58.2;

 if (distance >25)

 {
   digitalWrite(relay1,HIGH);
   delay(5000);
   digitalWrite(relay1,LOW);
   digitalWrite(relay2,HIGH);
   delay(5000);
 
   digitalWrite(relay2,LOW);
   digitalWrite(relay3,HIGH);
   delay(5000);
 
   digitalWrite(relay3,LOW);
   digitalWrite(relay4,HIGH);
   delay(5000);
 
   digitalWrite(relay4,LOW);

   delay(5000);
 
 }

 delay(50);
}


JAVA Sequence Pattern Program with * pattern Programming Logic and Code with Syntax