const int trig = 11;
const int echo = 12;

const int LED1 = 2;
const int LED2 = 3;
const int LED3 = 4;
const int LED4 = 5;
const int LED5 = 6;
const int LED6 = 7;
const int LED7 = 8;





 int duration = 0;
int distance =0;

void setup() {
  pinMode(trig, OUTPUT);
    pinMode(echo, INPUT);


  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
  
  pinMode(LED7, OUTPUT);
 



  Serial.begin(9600);
}

void loop() {
  digitalWrite(trig, HIGH);
  delayMicroseconds(1000);
  digitalWrite(trig, LOW);


  duration = pulseIn(echo, HIGH);
  distance = (duration / 2) / 28.5;
  Serial.println(distance);


  if (distance <= 30) {
    digitalWrite(LED1, HIGH);
  } else {
    digitalWrite(LED1, LOW);
  }
  if (distance <= 20) {
    digitalWrite(LED2, HIGH);
  } else {
    digitalWrite(LED2, LOW);
  }
  if (distance <= 15) {
    digitalWrite(LED3, HIGH);
  } else {
    digitalWrite(LED3, LOW);
  }
  if (distance <= 10) {
    digitalWrite(LED4, HIGH);
  } else {
    digitalWrite(LED4, LOW);
  }
  if (distance <= 7) {
    digitalWrite(LED5, HIGH);
  }
else {
    digitalWrite(LED5, LOW);
  }

if (distance <= 5) {
   
  }
   if (distance <= 4) {
    digitalWrite(LED6, HIGH);
  }
else {
    digitalWrite(LED6, LOW);
  }

if (distance <= 5) {
   
  }
   if (distance <= 2) {
    digitalWrite(LED7, HIGH);
  }
else {
    digitalWrite(LED7, LOW);
  }

if (distance <= 5) {
   
  }
 



  
}