int trig = 11, echo = 12, led = 2;
//float distance, duration;


void setup() {
  // put your setup code here, to run once:
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);

  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);

}

void loop()
{
  long duration;
  int distance;
  // put your main code here, to run repeatedly:
  digitalWrite(led, LOW);
  digitalWrite(trig, LOW);
  delayMicroseconds(10);
  digitalWrite(trig, HIGH);
  delayMicroseconds(2);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print(distance);
  delay(500);
  if (distance <= 10)
  {
    digitalWrite(led, HIGH);
    one();
  }
  else if(distance <= 30 && distance > 10)
  {
    digitalWrite(led, LOW);
    two();
  }

}
void one()
{
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
}
void two()
{
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
}